Yeah... that's why people are clicking through, and converting to sales :/
Are you saying they click through, and sign up to buy product, and then suddenly feel duped because they didn't know it was an advert they clicked on, and demand a refund???? Are you crazy?
> What if when you clicked on a HN story, a third of the time it were an ad?
I'd say about a third of the time it IS an ad - a YC backed startup with no merit etc.