Constantly advertising scams will also hurt their revenue if it's becomes popular opinion that YouTube is just a wild west of scams and scammers. The whole adpocalypse thing a few years back was spurred on by advertisers being worried about their adverts showing up on problematic content and even terrorist videos etc and withdrawing their ads and Youtube just went full overkill and into panic mode. I'm sure that will happen again someday and they will surely start facing legal consequences when people are continuing to lose money. It's not a good look for them at all and if they don't implement some safety standards they will soon be forced to by regulatory bodies. This stuff wouldn't fly on TV or other advertising platforms so not sure why YouTube will be able to get away with doing little to nothing.