According to a new research by ClickLab (reported on Mediapost) in pay-per-click advertising models fraudolent clicks can account for more than 50 percent of the total.
There are two different kind of frauds: the ones by competitors, in order to consume the daily advertisers' budget, and the ones by affiliates, in order to increase compensation.

It's not just competitors. Some people have figured out a way to concentrate enough US/Western Europe fradulent trafic to make a serious impact across the board. Fully 80% of the fradulent traffic in the medialab analysis come from this core group of less than 200 people.

http://www.stopclickfraud.com has reprinted my findings on this.

Posted by: Øystein Halseth Lund at October 19, 2004 02:40 PM