David Jackson reports he got a mail from AdSense team that invited him to test some "ads that are compensated based on a Cost-Per-Action [CPA] basis".
What does this mean? You get paid if someone clicks on the ad and performs an action (like buying the product). These ads won't compete with the regular pay-per-click ads and will be on a separate network.
I think a product should be really good and very well promoted to make me buy it the first time I see an ad. Most people compare different products and read reviews before making a purchase.
{ Via Blogoscoped. }