Conservative commentator Bill O'Reilly fumed against a Florida school district's decision to pull two of his books while officials determine whether they run afoul of a state law he supported.
The problem with those sorts of niche communities is that they need constant (sometimes heavy-handed) moderation to remain on topic. The Fediverse is not really good at that yet.
That and there needs to be a core of dedicated posters producing new, and good, content.
Reddit made a lot of it easy. Good(ish) mod tools (if you used third party apps or browser extensions) and communities that were large enough to keep people interested in the niche subs.
Paul: "How could you eat MY face?"
Carl: "It's quite simple actually: I took a look at your face, found it tasty, tool a little bite and ate it."
Paul: "That doesn't answer my question!"
Carl: "I remember you specifically giving me permission to, and i quote, 'eat all these faces'."
Paul: "Yeah, i was hoping that you wouldn't eat MY face! The face of your buddy, your best friend, your... soulmate."
Carl: "You could have been a bit more specific then. Now your face is gone. I ate it. And it was quite delicious."
Paul: "... Caaaaaarl."
Carl: "Really delicious! Yum!"