@spreadmastodon@mastodon.social @OutOnTheMoors @spreadmastodon@venera.social @fediversereport Maybe MAU to registered user ratio on servers over 100 registered users? I think it really comes down to the wizard for onboarding. Questions designed to drill down on region, hobbies, interests, then present options that represent the input. Some people want a small well defined community, others want to get lost in a crowd. Also moderation style has a big part to play.