This is a terrible idea for a site that relies solely on user-generated content and even user-moderation. It’s not like Twitter hasn’t tried this before - didn’t work out so well, I’d say. But hey, this concept probably works for the upper management. I guess it doesn’t matter to them if all that’s left is scorched earth, as long as they can cash out.
Sure, 1$ for 5.000 high quality posts - but only if it is content that you would otherwise only find in scientific journals; no AI stuff, of course.