Bluesky isn't just Twitter refugees/liberals that hate Musk? Couldn't imagine who else would be there and never cared to look into it.

Besides that, I think there has to be some initial "community" on a platform, so it might not be fair to classify one by that in the early days. Are we still early on nostr? 😁

See reddit's default subreddit list that targeted the 2010 internet man's interests. Now it has grown into some kind of mainstream platform with everything.

ActivityPub does seem to have diversity but mostly based around tech stuff. The good and maybe bad thing is how some federations get completely cut off from the rest.