I should share that I was an advisor briefly to Post.news, asked to put together an advisory board. I withdrew for various reasons -- disagreement about another advisor and about federation -- and have no ties to it now. I received nothing. I like Noam, its founder, and respect his work (Waze!). I'll watch Post. But I'm much more engaged here and want to study and learn about the potential of federation -- ActivityPub, Bluesky, Scuttlebutt -- as a model for public discourse.
It's really just because it's easier to make money there, correct? It's been pretty transparent to me to see who I followed who then went here versus who's going to Post. Some people want to get information out to the most people possible and some people only care if they make a brand.