> Vast majority of submitters could be cheaply verified and for small number of potential spammers Yeah, okay sure. I'm sure all the engineers working on thi

> Vast majority of submitters could be cheaply verified and for small number of potential spammers Yeah, okay sure. I'm sure all the engineers working on this product at google have never considered anything you wrote before. If there was a cheap, easy way to block spammers and meet all their other constraints, I'm sure they'd have done it by now. No matter what you do, if there is money involved, the scammers will eventually work around whatever you have in place to stop them. It is a constant, never ending game of whack-a-mole.