If I make a scam post on HN, Facebook, etc, their bottom line won't change regardless of whether it gets deleted or how many people end up seeing it. If I make

If I make a scam post on HN, Facebook, etc, their bottom line won't change regardless of whether it gets deleted or how many people end up seeing it. If I make a scam ad, there's a direct correlation between the amount of potential victims seeing it and how much money they make, so there's a monetary incentive to accept malicious ads and not ask too many questions.