David Jackson from SeekingAlpha Network said that he received an invitation from Google (GOOG) to try a new ad revenue model, known as Cost-Per-Action (CPA). This is in addition to the existing Cost-Per-1000-Impressions and Cost-Per-Click models.
The site owner gets paid an advertising commission if the visitor clicks on the ad and performs a certain action. This action can be buying a product or referring more visitors to the advertiser’s site. This model is similar to affiliate marketing, commonly practiced by many stores. One example is Sideshow Toys.