Earlier quoted context omitted.
No doubt, there is fraud in the system. If you want to be successful in using these ad platforms for your business, you will have to accept that as a fact of life. What you need to do is to exclude bad placements/websites from your campaign. But even before that, you have to see if your ads + landing page are compelling, or you'll just waste a ton of money.
> But even before that, you have to see if your ads + landing page are compelling, or you'll just waste a ton of money. And how do you determine that, ex ante?
At the end of the day we're still talking about sales, just in a new form, in a multi-dimensional bazaar called the Internet.