Fediverse growth is stalled for the same reason every alternative stalls: there's no one here, so there's no reason to join. Add on that there's no way for content factories to recoup the costs of content creation, no way to ensure their work reaches maximum eyeballs, and you pretty much guarantee a niche platform.
It''s the whole reason I'm here. I'm not interested in bullshit engagement-bait or people competing for imaginary internet points. Administration is going to do whatever administration wants, but if they're open and explicit about it, I can shop around for an instance that fits me. If they obfuscate their heavy handed administration, then I might as well go back to the algorithm.