registration-form.md

@@ -27,6 +27,10 @@ In up to 500 characters (the maximum length of a toot on Mastodon), can you tell
 
 <textarea id="about-me" name="about-me" rows="10" maxlength="500"></textarea>
 
+How did you find out about Social.Coop? We want to better understand how people are finding us.
+
+<textarea id="how-found" name="how-found" rows="10" maxlength="500"></textarea>
+
 ## Open Collective:
 Contributing through [Open Collective] is a condition
 of membership, so applicants must have an existing Open Collective profile, which can be set up [here](https://opencollective.com/create-account).