Wow. I've heard about this kind of thing before but haven't actually dug to go and find it

Whom do they sell the account to? How does the purchaser benefit from the account? I'm sure these are probably basic questions. I'm just curious

I'm largely ignorant to the mechanics of the attention economy in mass social media spaces, but what's the point of having bots post on social media platforms, only to be mass upvoted and interacted with by other bots? Like who benefits from that and how? Why is that a thing?