> It's something that's not well automated, and thus requires an enormous amount of labor (ie capital) This is why those who have tried have turned into racist pornography filled shit holes. Want to start a billion dollar startup? Figure out how to automate this problem.

Can't modern AI help with that? I'd guess GPT is pretty good at determining sentiment like racism.

Try it with ChatGpt, ask it determine if a sentence you give it is racist or not.

Of course, AI can't be the only moderator, but it may help to filter out most of the obvious cases.