A recently established index compiling information from more than 1,000 advertisers has estimated that about 12 percent of the clicks on ads running in the Google and Yahoo networks are fraudulent. Other studies have estimated the click fraud rate as high as 30 percent _ numbers that both Google and Yahoo have vehemently disputed.
http://www.washingtonpost.com/wp-dyn/content/article/2006/06/28/AR2006062801887.html |