Google have just launched a Beta within Google Adsense which looks to be a version of an Affiliate CPA network.
Called “Google Referrals” the Beta allows publishers to pick out of hundreds of advertisers therefore specifically increasing the relevance of the Google adverts while setting a defined action for the payment. Sound like an affiliate CPA to anyone?
With referrals, you’ll be paid when your visitors click through to an advertiser’s site and complete an action defined by your advertisers, such as a sale or sign up. Because these actions are often more involved than a simple click or impression, advertisers pay more for these referrals, which can translate into higher earnings for your site. Further, you’ll see the expected earnings and advertiser performance ahead of time, so you can make the best decisions about what to refer. You can also choose to target the keywords that will ensure you get the highest-paying referrals for your ad space.