His mastodon account has also been suspended on the server I'm on. Ugh, what is it with person C deciding that person B is not allowed to see what person A says. I dislike human nature sometimes. Or at least the personality type that is attracted to moderator positions.
So go to a different instance or even start up your own! That's the beauty of it, now you don't have to care what person C thinks - you can just go elsewhere.
Except that persons C, who control the instances where many interesting people are, have banned instances run by people who are not like the Cs. Furthermore, I don't even want to bother with all this stuff, playing detective trying to figure out the character of the moderators of different instances, figuring out how to migrate, and figuring out which other instances they federate with. There is no beauty to be found here, just human nature being such that as a species we can't even accomplish a platform where we can read the text messages from people we want to follow.