Earlier quoted context omitted.
Measuring the "content on the page" is hopelessly ambiguous and easy to scam. Even trying to price just based on how many other ad networks there are is problematic. For each additional ad network the value of each ad goes down. Even adding a second one may cut the value more than in half compared to exclusivity, because if the user sees the other network's ads first and they don't appear relevant they may not even l…
>Measuring the "content on the page" is hopelessly ambiguous and easy to scam. Is it? It seems pretty simple to audit your 10,000 largest ad-spend domains and check to see if they're actually just ad fraud. You'd need maybe 300 person-hours to do so, at an overhead-in cost of, let's high-ball it, 100$/hr, which puts you at a cost of $30,000. If you mean the process is impossible to automate, then don't try to automat…
You're figuring 10k domains in 300 hours, or 1.8min per domain. It's way more expensive than this, and it's an adversarial system. If you have rules about how spammy a site can be and still show your ads many sites are going to try and get as close to the boundary as possible without going over. This means it takes substantial effort to figure out which side of it they're on.
Then, the spammier sites run many different domains with multiple accounts, which means they're not that likely to show up as top domains. Spammy sites also can "cloak" so they show up one way to a reviewer at the ad network and another way to a real site visitor.
Manual inspection is definitely a valuable tool, and is something that ad networks use, but that a process like you described would catch 99% of fraud is massively optimistic.
(Disclosure: I work at Google on ad stuff, but not this sort of ad stuff. Speaking for myself and not the company.)