Interesting idea, I can see it portrayed as "you are providing us a service by targeting your ads, and therefore we want to make sure they are as targeted as po

Interesting idea, I can see it portrayed as "you are providing us a service by targeting your ads, and therefore we want to make sure they are as targeted as possible." I don't think advertisers would like it, because it relies heavily on the quality of a site's traffic, but it sounds great for ad networks. But no, I don't believe it's been done (could be wrong though...)