I’d say I’m generally conservative and have been dabbling in alternative social media for a number of years. Some of the biggest Mastodon instances are/were right leaning. Gab.ai started off as a proprietary site and then migrated to Mastodon. Truth.social was always based on Mastodon. I’ve never been active on them because I don’t like echo chambers though. I’ve never really had a desire to have my thoughts reaffirmed by strangers…

I would assume they’re presence isn’t felt in the fediverse because the concept of de-federating is working? Gab is likely cut off by others and truth social never federated with others to begin with. I don’t think Truth ever intended to though, and really just wanted something they didn’t have to build from scratch.

The only Mastodon instance I actually have an account with now is somewhat right leaning but it’s not their emphasis. Even then I’m not too active on it.