diff --git a/locales/fr_FR/LC_MESSAGES/main.mo b/locales/fr_FR/LC_MESSAGES/main.mo
index d803680b..65b73bbe 100644
Binary files a/locales/fr_FR/LC_MESSAGES/main.mo and b/locales/fr_FR/LC_MESSAGES/main.mo differ
diff --git a/locales/fr_FR/LC_MESSAGES/main.po b/locales/fr_FR/LC_MESSAGES/main.po
index 71876f37..afcc8b6c 100644
--- a/locales/fr_FR/LC_MESSAGES/main.po
+++ b/locales/fr_FR/LC_MESSAGES/main.po
@@ -1,8 +1,8 @@
 msgid ""
 msgstr ""
 "Project-Id-Version: flusio\n"
-"POT-Creation-Date: 2023-09-08 16:05+0200\n"
-"PO-Revision-Date: 2023-09-08 16:06+0200\n"
+"POT-Creation-Date: 2024-03-10 18:30+0100\n"
+"PO-Revision-Date: 2024-03-10 18:31+0100\n"
 "Last-Translator: Marien Fressinaud <dev@marienfressinaud.fr>\n"
 "Language-Team: \n"
 "Language: fr_FR\n"
@@ -10,15 +10,15 @@ msgstr ""
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
 "Plural-Forms: nplurals=2; plural=(n > 1);\n"
-"X-Generator: Poedit 3.3.2\n"
+"X-Generator: Poedit 3.4.2\n"
 "X-Poedit-Basepath: ../../../src\n"
 "X-Poedit-KeywordsList: _f;_n:1,2;_nf:1,2;Translatable\n"
 "X-Poedit-SearchPath-0: .\n"
 
 #: assets/javascripts/controllers/back_button_controller.js:47
-#: views/_layouts/connected.phtml:221
-#: views/_layouts/connected_blocked.phtml:180
-#: views/_layouts/not_connected.phtml:147
+#: views/_layouts/connected.phtml:225
+#: views/_layouts/connected_blocked.phtml:184
+#: views/_layouts/not_connected.phtml:151
 msgid "Back"
 msgstr "Retour"
 
@@ -51,7 +51,7 @@ msgstr "Afficher"
 #: controllers/Links.php:270 controllers/Links.php:442
 #: controllers/Mastodon.php:211 controllers/Mastodon.php:297
 #: controllers/News.php:75 controllers/Passwords.php:89
-#: controllers/Passwords.php:192 controllers/Registrations.php:105
+#: controllers/Passwords.php:192 controllers/Registrations.php:103
 #: controllers/Sessions.php:85 controllers/Support.php:70
 #: controllers/collections/Filters.php:105
 #: controllers/collections/Followers.php:49
@@ -61,7 +61,7 @@ msgstr "Afficher"
 #: controllers/collections/Shares.php:98 controllers/collections/Shares.php:211
 #: controllers/links/Messages.php:84 controllers/links/Repairing.php:99
 #: controllers/links/Searches.php:106 controllers/my/Account.php:111
-#: controllers/my/Preferences.php:78 controllers/my/Profile.php:73
+#: controllers/my/Preferences.php:82 controllers/my/Profile.php:73
 #: controllers/my/Security.php:93 controllers/my/Security.php:209
 #: controllers/my/Subscription.php:74 controllers/my/Validation.php:138
 msgid "A security verification failed: you should retry to submit the form."
@@ -77,7 +77,7 @@ msgstr "L’une des thématiques associées n’existe pas."
 #: controllers/Groups.php:161 controllers/Importations.php:48
 #: controllers/Links.php:499 controllers/Mastodon.php:87
 #: controllers/Messages.php:93 controllers/Messages.php:141
-#: controllers/Sessions.php:208 controllers/collections/Read.php:73
+#: controllers/Sessions.php:206 controllers/collections/Read.php:73
 #: controllers/collections/Read.php:139 controllers/collections/Read.php:200
 #: controllers/importations/Opml.php:79 controllers/importations/Pocket.php:110
 #: controllers/importations/Pocket.php:157
@@ -136,7 +136,7 @@ msgid "The token has expired, you should reset your password again."
 msgstr ""
 "Le token a expiré, vous devez de nouveau réinitialiser votre mot de passe."
 
-#: controllers/Registrations.php:118
+#: controllers/Registrations.php:116
 msgid "You must accept the terms of service."
 msgstr "Vous devez accepter les conditions générales d’utilisation."
 
@@ -307,7 +307,7 @@ msgid "Links never to read"
 msgstr "Liens à ne jamais lire"
 
 #: models/Collection.php:153 models/Collection.php:186
-#: views/_layouts/connected.phtml:82 views/news/index.phtml:3
+#: views/_layouts/connected.phtml:86 views/news/index.phtml:3
 #: views/news/index.phtml:16
 msgid "News"
 msgstr "Journal"
@@ -530,128 +530,128 @@ msgstr "Commentaires sur %s"
 msgid "Error: "
 msgstr "Erreur : "
 
-#: views/_layouts/connected.phtml:43 views/_layouts/connected_blocked.phtml:39
-#: views/_layouts/not_connected.phtml:57 views/_layouts/onboarding.phtml:39
+#: views/_layouts/connected.phtml:47 views/_layouts/connected_blocked.phtml:43
+#: views/_layouts/not_connected.phtml:61 views/_layouts/onboarding.phtml:43
 msgid "Skip to main content"
 msgstr "Accéder au contenu principal"
 
-#: views/_layouts/connected.phtml:50 views/_layouts/connected_blocked.phtml:46
-#: views/_layouts/not_connected.phtml:64 views/_layouts/onboarding.phtml:46
+#: views/_layouts/connected.phtml:54 views/_layouts/connected_blocked.phtml:50
+#: views/_layouts/not_connected.phtml:68 views/_layouts/onboarding.phtml:50
 #, php-format
 msgid "You need to activate JavaScript in order to use %s."
 msgstr "Vous devez activer JavaScript pour utiliser %s."
 
-#: views/_layouts/connected.phtml:58 views/_layouts/connected_blocked.phtml:54
-#: views/_layouts/not_connected.phtml:72
+#: views/_layouts/connected.phtml:62 views/_layouts/connected_blocked.phtml:58
+#: views/_layouts/not_connected.phtml:76
 #, php-format
 msgid "You’re using a demo version of %s, the data are reset every night."
 msgstr ""
 "Vous utilisez une version de démo de %s, les données sont réinitialisées "
 "chaque nuit."
 
-#: views/_layouts/connected.phtml:66 views/_layouts/connected_blocked.phtml:62
+#: views/_layouts/connected.phtml:70 views/_layouts/connected_blocked.phtml:66
 msgid "You must validate your account&nbsp;→"
 msgstr "Vous devez valider votre compte&nbsp;→"
 
-#: views/_layouts/connected.phtml:93 views/links/index.phtml:3
+#: views/_layouts/connected.phtml:97 views/links/index.phtml:3
 #: views/links/index.phtml:19
 msgid "My links"
 msgstr "Mes liens"
 
-#: views/_layouts/connected.phtml:104 views/feeds/index.phtml:3
+#: views/_layouts/connected.phtml:108 views/feeds/index.phtml:3
 #: views/feeds/index.phtml:15
 msgid "Feeds"
 msgstr "Flux"
 
-#: views/_layouts/connected.phtml:117 views/collections/_selector.phtml:83
+#: views/_layouts/connected.phtml:121 views/collections/_selector.phtml:83
 #: views/collections/groups/edit.phtml:88 views/links/searches/show.phtml:9
 #: views/links/searches/show.phtml:21
 msgid "New"
 msgstr "Nouveau"
 
-#: views/_layouts/connected.phtml:126 views/_layouts/connected.phtml:129
-#: views/_layouts/connected_blocked.phtml:85
-#: views/_layouts/connected_blocked.phtml:88
+#: views/_layouts/connected.phtml:130 views/_layouts/connected.phtml:133
+#: views/_layouts/connected_blocked.phtml:89
+#: views/_layouts/connected_blocked.phtml:92
 #, php-format
 msgid "Menu of %s"
 msgstr "Menu de %s"
 
-#: views/_layouts/connected.phtml:147
-#: views/_layouts/connected_blocked.phtml:106 views/my/profile/edit.phtml:3
+#: views/_layouts/connected.phtml:151
+#: views/_layouts/connected_blocked.phtml:110 views/my/profile/edit.phtml:3
 #: views/my/profile/edit.phtml:14
 msgid "Profile"
 msgstr "Profil"
 
-#: views/_layouts/connected.phtml:157
-#: views/_layouts/connected_blocked.phtml:116 views/my/preferences/edit.phtml:3
+#: views/_layouts/connected.phtml:161
+#: views/_layouts/connected_blocked.phtml:120 views/my/preferences/edit.phtml:3
 #: views/my/preferences/edit.phtml:12
 msgid "Preferences"
 msgstr "Préférences"
 
-#: views/_layouts/connected.phtml:167
-#: views/_layouts/connected_blocked.phtml:126 views/my/account/show.phtml:3
+#: views/_layouts/connected.phtml:171
+#: views/_layouts/connected_blocked.phtml:130 views/my/account/show.phtml:3
 #: views/my/account/show.phtml:11
 msgid "Account & data"
 msgstr "Compte & données"
 
-#: views/_layouts/connected.phtml:179
-#: views/_layouts/connected_blocked.phtml:138 views/pages/addons.phtml:3
+#: views/_layouts/connected.phtml:183
+#: views/_layouts/connected_blocked.phtml:142 views/pages/addons.phtml:3
 #: views/pages/addons.phtml:11
 msgid "Add-ons"
 msgstr "Extensions"
 
-#: views/_layouts/connected.phtml:189
-#: views/_layouts/connected_blocked.phtml:148 views/support/show.phtml:3
+#: views/_layouts/connected.phtml:193
+#: views/_layouts/connected_blocked.phtml:152 views/support/show.phtml:3
 #: views/support/show.phtml:12
 msgid "Help & support"
 msgstr "Aide & support"
 
-#: views/_layouts/connected.phtml:198
-#: views/_layouts/connected_blocked.phtml:157
+#: views/_layouts/connected.phtml:202
+#: views/_layouts/connected_blocked.phtml:161
 msgid "Log out"
 msgstr "Se déconnecter"
 
-#: views/_layouts/connected.phtml:232 views/_layouts/connected.phtml:233
+#: views/_layouts/connected.phtml:236 views/_layouts/connected.phtml:237
 msgid "Search links by words or URL"
 msgstr "Rechercher des liens par mots ou URL"
 
-#: views/_layouts/connected.phtml:241 views/links/searches/show.phtml:47
+#: views/_layouts/connected.phtml:245 views/links/searches/show.phtml:47
 #: views/links/searches/show.phtml:63
 msgid "Search"
 msgstr "Rechercher"
 
-#: views/_layouts/error.phtml:18
+#: views/_layouts/error.phtml:22
 msgid "Oh no&nbsp;😟"
 msgstr "Oh non&nbsp;😟"
 
-#: views/_layouts/not_connected.phtml:92 views/registrations/new.phtml:160
+#: views/_layouts/not_connected.phtml:96 views/registrations/new.phtml:172
 msgid "Sign up"
 msgstr "S’inscrire"
 
-#: views/_layouts/not_connected.phtml:96 views/sessions/new.phtml:97
+#: views/_layouts/not_connected.phtml:100 views/sessions/new.phtml:97
 msgid "Login"
 msgstr "Se connecter"
 
-#: views/_layouts/not_connected.phtml:110 views/onboarding/step1.phtml:26
+#: views/_layouts/not_connected.phtml:114 views/onboarding/step1.phtml:26
 msgid "Choose your language"
 msgstr "Choisissez votre langue"
 
-#: views/_layouts/not_connected.phtml:160 views/pages/about.phtml:3
+#: views/_layouts/not_connected.phtml:164 views/pages/about.phtml:3
 #: views/pages/about.phtml:11 views/support/show.phtml:115
 #, php-format
 msgid "About %s"
 msgstr "À propos de %s"
 
-#: views/_layouts/onboarding.phtml:65
+#: views/_layouts/onboarding.phtml:69
 #, php-format
 msgid "Step %d on %d"
 msgstr "Étape %d sur %d"
 
-#: views/_layouts/onboarding.phtml:67
+#: views/_layouts/onboarding.phtml:71
 msgid "skip"
 msgstr "passer"
 
-#: views/_layouts/onboarding.phtml:69
+#: views/_layouts/onboarding.phtml:73
 msgid "finished"
 msgstr "terminé"
 
@@ -691,7 +691,7 @@ msgstr "Page suivante"
 #: views/my/security/show.phtml:41 views/my/security/show.phtml:81
 #: views/passwords/edit.phtml:58 views/passwords/forgot.phtml:48
 #: views/registrations/new.phtml:51 views/registrations/new.phtml:76
-#: views/registrations/new.phtml:122 views/registrations/new.phtml:134
+#: views/registrations/new.phtml:122 views/registrations/new.phtml:146
 #: views/sessions/new.phtml:49 views/sessions/new.phtml:88
 #: views/support/show.phtml:51 views/support/show.phtml:75
 msgid "Error"
@@ -844,7 +844,7 @@ msgstr "Afficher la collection publiquement"
 #: views/collections/edit.phtml:132 views/collections/filters/edit.phtml:90
 #: views/collections/groups/edit.phtml:105 views/groups/edit.phtml:53
 #: views/links/edit.phtml:82 views/mastodon/show.phtml:86
-#: views/messages/edit.phtml:53 views/my/preferences/edit.phtml:86
+#: views/messages/edit.phtml:53 views/my/preferences/edit.phtml:99
 #: views/my/profile/edit.phtml:101 views/my/security/show.phtml:94
 msgid "Save changes"
 msgstr "Enregistrer les modifications"
@@ -1966,11 +1966,17 @@ msgstr ""
 "En mode compact, vous voyez plus de liens en un coup d’œil, mais vous "
 "pourriez vous sentir submergé par la quantité d’informations."
 
-#: views/my/preferences/edit.phtml:76
+#: views/my/preferences/edit.phtml:75 views/registrations/new.phtml:137
+msgid "Accept to be contacted by email to help improve the service (optional)."
+msgstr ""
+"Accepter d’être contacté‧e par courriel pour aider à améliorer le service "
+"(facultatif)."
+
+#: views/my/preferences/edit.phtml:89
 msgid "Enable beta features"
 msgstr "Activer les fonctionnalités bêta"
 
-#: views/my/preferences/edit.phtml:80
+#: views/my/preferences/edit.phtml:93
 msgid ""
 "With beta features you test some features before everyone else, but you "
 "enter a turbulent zone."
@@ -2624,7 +2630,7 @@ msgstr ""
 msgid "And a password"
 msgstr "Et un mot de passe"
 
-#: views/registrations/new.phtml:140
+#: views/registrations/new.phtml:152
 #, php-format
 msgid ""
 "Before going any further, please read <a href=\"%s\" target=\"_blank\">the "
@@ -2634,11 +2640,11 @@ msgstr ""
 "target=\"_blank\">les conditions générales d’utilisation</a> pour vous "
 "assurer que celles-ci vous conviennent."
 
-#: views/registrations/new.phtml:153
+#: views/registrations/new.phtml:165
 msgid "Accept the terms of service"
 msgstr "Accepter les conditions générales d’utilisation"
 
-#: views/registrations/new.phtml:167
+#: views/registrations/new.phtml:179
 msgid "Already an account?"
 msgstr "Déjà un compte ?"
 
@@ -2662,15 +2668,34 @@ msgstr "Mot de passe oublié ?"
 msgid "No account yet?"
 msgstr "Pas encore de compte ?"
 
-#: views/showcases/show_link.phtml:3 views/showcases/show_link.phtml:10
+#: views/showcases/show_contact.phtml:3 views/showcases/show_contact.phtml:11
+msgid "You can help to improve the service"
+msgstr "Vous pouvez aider à améliorer le service"
+
+#: views/showcases/show_contact.phtml:15
+#, php-format
+msgid "To help us improve %s, you can now accept to be contacted by email."
+msgstr ""
+"Afin de nous aider à améliorer %s, vous pouvez désormais accepter d’être "
+"contacté par courriel."
+
+#: views/showcases/show_contact.phtml:20
+msgid "Go to your preferences"
+msgstr "Rendez-vous dans vos préférences"
+
+#: views/showcases/show_contact.phtml:27
+msgid "No thanks!"
+msgstr "Non merci !"
+
+#: views/showcases/show_link.phtml:3 views/showcases/show_link.phtml:11
 msgid "Links have been improved"
 msgstr "Les liens ont été améliorés"
 
-#: views/showcases/show_link.phtml:14 views/showcases/show_navigation.phtml:14
+#: views/showcases/show_link.phtml:15 views/showcases/show_navigation.phtml:15
 msgid "Something has changed!"
 msgstr "Quelque chose a changé !"
 
-#: views/showcases/show_link.phtml:18
+#: views/showcases/show_link.phtml:19
 msgid ""
 "<strong>The link interface is now more consistent and practical.</strong> "
 "You can mark a link as read, or add it to your bookmarks in one click. The "
@@ -2682,7 +2707,7 @@ msgstr ""
 "un clic. Le lien « lire » a été enlevé, mais ne vous inquiétez pas : vous "
 "pouvez toujours cliquer sur les titres pour lire vos liens !"
 
-#: views/showcases/show_link.phtml:23
+#: views/showcases/show_link.phtml:24
 msgid ""
 "The screenshot of a link card. The actions at its bottom allow to mark as "
 "read, add to bookmarks and store the link."
@@ -2690,12 +2715,12 @@ msgstr ""
 "La capture d’écran d’un lien. Les actions en-dessous du lien permettent de "
 "le marquer comme lu, de l’ajouter aux signets et de le ranger."
 
-#: views/showcases/show_link.phtml:28
+#: views/showcases/show_link.phtml:29
 msgid "The look of the links on mobile has also been improved to save space."
 msgstr ""
 "Les liens ont également été améliorés sur mobile pour gagner de la place."
 
-#: views/showcases/show_link.phtml:32 views/showcases/show_navigation.phtml:32
+#: views/showcases/show_link.phtml:33 views/showcases/show_navigation.phtml:33
 msgid ""
 "Don’t hesitate <strong>to give feedback</strong> from the “Help & support” "
 "menu!"
@@ -2703,16 +2728,16 @@ msgstr ""
 "N’hésitez pas <strong>à faire des retours</strong> depuis le menu « Aide & "
 "support » !"
 
-#: views/showcases/show_link.phtml:38 views/showcases/show_navigation.phtml:38
+#: views/showcases/show_link.phtml:39 views/showcases/show_navigation.phtml:39
 msgid "Got it!"
 msgstr "C’est noté !"
 
 #: views/showcases/show_navigation.phtml:3
-#: views/showcases/show_navigation.phtml:10
+#: views/showcases/show_navigation.phtml:11
 msgid "A new navigation is available"
 msgstr "Une nouvelle navigation est disponible"
 
-#: views/showcases/show_navigation.phtml:18
+#: views/showcases/show_navigation.phtml:19
 msgid ""
 "<strong>The navigation has been revised to make it more intuitive.</strong> "
 "The things you own are now separated from the things you follow."
@@ -2721,12 +2746,12 @@ msgstr ""
 "Les choses que vous possédez sont désormais séparées des choses que vous "
 "suivez."
 
-#: views/showcases/show_navigation.phtml:23
+#: views/showcases/show_navigation.phtml:24
 msgid "The navigation bar showing three tabs: News, My links and Feeds"
 msgstr ""
 "La barre de navigation qui montre trois onglets : Journal, Mes liens et Flux"
 
-#: views/showcases/show_navigation.phtml:28
+#: views/showcases/show_navigation.phtml:29
 msgid ""
 "Your bookmarks, read links and your own collections are now under the “My "
 "links” tab. Followed collections and feeds are only one concept and can be "
diff --git a/src/Application.php b/src/Application.php
index 852ccb07..1718194c 100644
--- a/src/Application.php
+++ b/src/Application.php
@@ -132,6 +132,8 @@ public function run(\Minz\Request $request): mixed
                 $autoload_modal_url = \Minz\Url::for('showcase', ['id' => 'navigation']);
             } elseif ($current_user->autoload_modal === 'showcase link') {
                 $autoload_modal_url = \Minz\Url::for('showcase', ['id' => 'link']);
+            } elseif ($current_user->autoload_modal === 'showcase contact') {
+                $autoload_modal_url = \Minz\Url::for('showcase', ['id' => 'contact']);
             }
 
             // Force CSRF token to avoid weird issues when user did nothing for a while
diff --git a/src/cli/Help.php b/src/cli/Help.php
index 81a1ff2f..f1da9aa5 100644
--- a/src/cli/Help.php
+++ b/src/cli/Help.php
@@ -92,6 +92,7 @@ public function show(): Response
         $usage .= "      --url=TEXT           where TEXT is an external URL\n";
         $usage .= "\n";
         $usage .= "  users                    List all the users\n";
+        $usage .= "      [--to-contact=BOOL]  list only the users who accepted to be contacted (default: false)\n";
         $usage .= "  users create             Create a user\n";
         $usage .= "      --email=EMAIL\n";
         $usage .= "      --password=PASSWORD\n";
diff --git a/src/cli/Users.php b/src/cli/Users.php
index 0ef7b706..5ee96f80 100644
--- a/src/cli/Users.php
+++ b/src/cli/Users.php
@@ -19,11 +19,20 @@ class Users
     /**
      * List all the users ordered by created_at.
      *
+     * @request_param bool to-contact
+     *
      * @response 200
      */
     public function index(Request $request): Response
     {
-        $users = models\User::listAll();
+        $to_contact = $request->paramBoolean('to-contact');
+
+        if ($to_contact) {
+            $users = models\User::listBy(['accept_contact' => true]);
+        } else {
+            $users = models\User::listAll();
+        }
+
         usort($users, function ($user1, $user2) {
             if ($user1->created_at == $user2->created_at) {
                 return 0;
diff --git a/src/controllers/Registrations.php b/src/controllers/Registrations.php
index 365ecd6f..4af0cf70 100644
--- a/src/controllers/Registrations.php
+++ b/src/controllers/Registrations.php
@@ -59,7 +59,8 @@ public function new(): Response
      * @request_param string email
      * @request_param string username
      * @request_param string password
-     * @request_param string accept_terms
+     * @request_param bool accept_terms
+     * @request_param bool accept_contact
      *
      * @response 302 / if already connected
      * @response 302 /login if registrations are closed
@@ -68,10 +69,6 @@ public function new(): Response
      * @response 400 if the service has terms of service and accept_terms is false
      * @response 400 if email already exists
      * @response 302 /onboarding
-     *
-     * @param \Minz\Request $request
-     *
-     * @return \Minz\Response
      */
     public function create(Request $request): Response
     {
@@ -91,7 +88,8 @@ public function create(Request $request): Response
         $username = $request->param('username', '');
         $email = $request->param('email', '');
         $password = $request->param('password', '');
-        $accept_terms = $request->param('accept_terms', false);
+        $accept_terms = $request->paramBoolean('accept_terms');
+        $accept_contact = $request->paramBoolean('accept_contact');
         $csrf = $request->param('csrf', '');
 
         if (!\Minz\Csrf::validate($csrf)) {
@@ -134,6 +132,8 @@ public function create(Request $request): Response
             ]);
         }
 
+        $user->accept_contact = $accept_contact;
+
         // Initialize the validation token
         $validation_token = new models\Token(1, 'day', 16);
         $validation_token->save();
diff --git a/src/controllers/Showcases.php b/src/controllers/Showcases.php
index 4000973a..afabebfb 100644
--- a/src/controllers/Showcases.php
+++ b/src/controllers/Showcases.php
@@ -29,6 +29,8 @@ public function show(Request $request): Response
             return Response::ok('showcases/show_navigation.phtml');
         } elseif ($id === 'link') {
             return Response::ok('showcases/show_link.phtml');
+        } elseif ($id === 'contact') {
+            return Response::ok('showcases/show_contact.phtml');
         } else {
             return Response::notFound('not_found.phtml');
         }
diff --git a/src/controllers/my/Preferences.php b/src/controllers/my/Preferences.php
index 634deffb..cd2e8e55 100644
--- a/src/controllers/my/Preferences.php
+++ b/src/controllers/my/Preferences.php
@@ -34,6 +34,7 @@ public function edit(Request $request): Response
         return Response::ok('my/preferences/edit.phtml', [
             'locale' => $user->locale,
             'option_compact_mode' => $user->option_compact_mode,
+            'accept_contact' => $user->accept_contact,
             // Don't name it "beta_enabled" because there's already a global
             // view variable named like this.
             'is_beta_enabled' => models\FeatureFlag::isEnabled('beta', $user->id),
@@ -45,8 +46,9 @@ public function edit(Request $request): Response
      *
      * @request_param string csrf
      * @request_param string locale
-     * @request_param boolean option_compact_mode
-     * @request_param boolean beta_enabled
+     * @request_param bool option_compact_mode
+     * @request_param bool accept_contact
+     * @request_param bool beta_enabled
      * @request_param string from
      *
      * @response 302 /login?redirect_to=:from
@@ -59,8 +61,9 @@ public function edit(Request $request): Response
     public function update(Request $request): Response
     {
         $locale = $request->param('locale', '');
-        $option_compact_mode = $request->paramBoolean('option_compact_mode', false);
-        $beta_enabled = $request->paramBoolean('beta_enabled', false);
+        $option_compact_mode = $request->paramBoolean('option_compact_mode');
+        $accept_contact = $request->paramBoolean('accept_contact');
+        $beta_enabled = $request->paramBoolean('beta_enabled');
         $csrf = $request->param('csrf', '');
         $from = $request->param('from', '');
 
@@ -73,6 +76,7 @@ public function update(Request $request): Response
             return Response::badRequest('my/preferences/edit.phtml', [
                 'locale' => $locale,
                 'option_compact_mode' => $option_compact_mode,
+                'accept_contact' => $accept_contact,
                 'is_beta_enabled' => $beta_enabled,
                 'from' => $from,
                 'error' => _('A security verification failed: you should retry to submit the form.'),
@@ -82,6 +86,7 @@ public function update(Request $request): Response
         $old_locale = $user->locale;
         $user->locale = trim($locale);
         $user->option_compact_mode = $option_compact_mode;
+        $user->accept_contact = $accept_contact;
 
         $errors = $user->validate();
         if ($errors) {
@@ -89,6 +94,7 @@ public function update(Request $request): Response
             return Response::badRequest('my/preferences/edit.phtml', [
                 'locale' => $locale,
                 'option_compact_mode' => $option_compact_mode,
+                'accept_contact' => $accept_contact,
                 'is_beta_enabled' => $beta_enabled,
                 'from' => $from,
                 'errors' => $errors,
diff --git a/src/migrations/Migration202403100001AddAcceptContactToUsers.php b/src/migrations/Migration202403100001AddAcceptContactToUsers.php
new file mode 100644
index 00000000..3a00f097
--- /dev/null
+++ b/src/migrations/Migration202403100001AddAcceptContactToUsers.php
@@ -0,0 +1,30 @@
+<?php
+
+namespace flusio\migrations;
+
+class Migration202403100001AddAcceptContactToUsers
+{
+    public function migrate(): bool
+    {
+        $database = \Minz\Database::get();
+
+        $database->exec(<<<'SQL'
+            ALTER TABLE users
+            ADD COLUMN accept_contact BOOLEAN NOT NULL DEFAULT false;
+        SQL);
+
+        return true;
+    }
+
+    public function rollback(): bool
+    {
+        $database = \Minz\Database::get();
+
+        $database->exec(<<<'SQL'
+            ALTER TABLE users
+            DROP COLUMN accept_contact;
+        SQL);
+
+        return true;
+    }
+}
diff --git a/src/migrations/Migration202403100002SetAutoloadModalToShowcaseContact.php b/src/migrations/Migration202403100002SetAutoloadModalToShowcaseContact.php
new file mode 100644
index 00000000..8b35a061
--- /dev/null
+++ b/src/migrations/Migration202403100002SetAutoloadModalToShowcaseContact.php
@@ -0,0 +1,28 @@
+<?php
+
+namespace flusio\migrations;
+
+class Migration202403100002SetAutoloadModalToShowcaseContact
+{
+    public function migrate(): bool
+    {
+        $database = \Minz\Database::get();
+
+        $database->exec(<<<'SQL'
+            UPDATE users SET autoload_modal = 'showcase contact';
+        SQL);
+
+        return true;
+    }
+
+    public function rollback(): bool
+    {
+        $database = \Minz\Database::get();
+
+        $database->exec(<<<'SQL'
+            UPDATE users SET autoload_modal = '';
+        SQL);
+
+        return true;
+    }
+}
diff --git a/src/models/User.php b/src/models/User.php
index 30d52305..475c18f4 100644
--- a/src/models/User.php
+++ b/src/models/User.php
@@ -91,6 +91,9 @@ class User
     #[Database\Column]
     public bool $option_compact_mode;
 
+    #[Database\Column]
+    public bool $accept_contact;
+
     public function __construct(string $username, string $email, string $password)
     {
         $this->id = \Minz\Random::timebased();
diff --git a/src/schema.sql b/src/schema.sql
index 3294a957..6eb9879f 100644
--- a/src/schema.sql
+++ b/src/schema.sql
@@ -38,6 +38,7 @@ CREATE TABLE users (
     csrf TEXT NOT NULL DEFAULT '',
     autoload_modal TEXT NOT NULL DEFAULT '',
     option_compact_mode BOOLEAN NOT NULL DEFAULT false,
+    accept_contact BOOLEAN NOT NULL DEFAULT false,
 
     validated_at TIMESTAMPTZ,
     validation_token TEXT REFERENCES tokens ON DELETE SET NULL ON UPDATE CASCADE,
diff --git a/src/views/my/preferences/edit.phtml b/src/views/my/preferences/edit.phtml
index 98a8652f..f827fe9e 100644
--- a/src/views/my/preferences/edit.phtml
+++ b/src/views/my/preferences/edit.phtml
@@ -63,6 +63,19 @@
             </p>
         </div>
 
+        <div class="form-group">
+            <input
+                type="checkbox"
+                id="accept-contact"
+                name="accept_contact"
+                <?= $accept_contact ? 'checked' : '' ?>
+            />
+
+            <label class="label--checkbox" for="accept-contact">
+                <?= _('Accept to be contacted by email to help improve the service (optional).') ?>
+            </label>
+        </div>
+
         <div class="form-group">
             <input
                 type="checkbox"
diff --git a/src/views/registrations/new.phtml b/src/views/registrations/new.phtml
index 60b2404f..7b1371e7 100644
--- a/src/views/registrations/new.phtml
+++ b/src/views/registrations/new.phtml
@@ -126,6 +126,18 @@
             </div>
         </div>
 
+        <div class="form-group">
+            <input
+                type="checkbox"
+                id="accept-contact"
+                name="accept_contact"
+            />
+
+            <label class="label--checkbox" for="accept-contact">
+                <?= _('Accept to be contacted by email to help improve the service (optional).') ?>
+            </label>
+        </div>
+
         <?php if ($has_terms): ?>
             <div class="form-group form-group--terms <?= isset($errors['accept_terms']) ? 'form-group--invalid' : '' ?>">
                 <div id="accept-terms-desc">
diff --git a/src/views/showcases/show_contact.phtml b/src/views/showcases/show_contact.phtml
new file mode 100644
index 00000000..96a0b689
--- /dev/null
+++ b/src/views/showcases/show_contact.phtml
@@ -0,0 +1,31 @@
+<?php
+    $this->layout('base.phtml', [
+        'title' => _('You can help to improve the service'),
+        'canonical' => url_full('showcase', ['id' => 'contact']),
+        'modal_enabled' => true,
+    ]);
+?>
+
+<div class="section section--small">
+    <div class="section__title">
+        <h1><?= _('You can help to improve the service') ?></h1>
+    </div>
+
+    <p>
+        <?= _f('To help us improve %s, you can now accept to be contacted by email.', $brand) ?>
+    </p>
+
+    <p class="text--centered">
+        <a href="<?= url('preferences') ?>" class="anchor--action" data-turbo-frame="_top">
+            <?= _('Go to your preferences') ?>
+        </a>
+    </p>
+
+    <form method="get" action="" data-turbo-frame="_top">
+        <div class="form__actions">
+            <button type="submit" class="button--ghost">
+                <?= _('No thanks!') ?>
+            </button>
+        </div>
+    </form>
+</div>