Well if I have an account and I say "I'm Bill and this is what I think..." and then I make another account saying "Hi Bill, I'm Ben, I just want to say that you're so clever and so correct about all of this. You're amazing, and I say that as a totally separate human being who's never met you before"... then clearly that's manipulative, because someone reading those posts gets the impression of organic engagement which in fact doesn't exist.