What both 'tgsovlerkhgsel and I are trying to say is that there is this kind of realpolitik going on at Mastodon, of which you should be aware before considering to join. You start going against the "party line", you risk getting defederated or, if you're an user on someone else's instance, having your instance's admins pressured to ban you on the threat of the whole instance getting defederated by others. And it's a significant threat, because as much as Mastodon is distributed, people still want to stay connected to the major instances.

I myself moved from Twitter to Mastodon a while ago and very much enjoy it, but I also try to not say anything there that would attract interest of the defederationists.