Content creation AI is being worked on and it's getting very good. The top AI companies will keep the good stuff to themselves, but they've started to license out some of their tech for a pretty high price. Luckily for us authors aren't very highly paid in general, but language capabilities are one of the necessary domains for their AI to master to dominate other fields so it's very advanced by this point.

An AGI would be able to curate and create posts that would reap rewards at near maximum efficiency levels, with some initial capital it and similar AI would dominate the platform in short time.