Facebook, TikTok, Instagram, Twitter… have paid moderators.

Yes, so the biggest centralised social medias that run most of the modern web. Of which Reddit is a part.

tbh I don’t think it is on reddit either.

Really depends on what you moderate. Some subreddits deal with culture war warriors sending rape threats, doxxing, brigading, etc. I used to mod a subreddit where another mod had to delete her account because she was doxxed by kiwifarms.