If true fraud levels were exposed it could shift the digital economy in a massive way.
Say you have an unpopular dishwasher and it breaks. It's great to go to Youtube and find someone showing you how to fix the problem even for a relatively niche dishwasher. But if the ad money dries up for that content producer, that video won't be there the next time you look for it.
Or you will be forced to pay $1.00 to watch it.