How is a binary blob self reported? It can be signed and is totally in control of the ad network, just runs on the actual website. And click fraud wouldn't even exist if the ad network would pay per page impression/view. And ad networks will have to adapt in some way anyway for iOS9.

The Question is how does the website owner prove real organic impressions to the Advertiser? If people can buy ad clicks, they also can buy fraudulent ad impressions. A manipulated reverse proxy could also simulate fake impressions. What could work is if cloudflare becomes an ad network and injects advertising into your site.