Report: Fraudulent Web-Ad Clicks About 14 Percent of Total ... That's up from a click fraud rate of 13.7 percent three months ago, according to Click Forensics, a San Antonio-based consulting service that compiles the index. ... About 12.8 percent of the clicks on ads served up by Google and Yahoo are deceptive, up from 12.1 percent three months ago. ... It is interesting to see this issue getting more press coverage because companies are starting to see profit potential in the emerging "click fraud prevention" space. Capitalism at work!
i was reading article yesterday, it seems your numbers are too conservative, for Yahoo it is estimated 25-27% click fraud, over 30% business customers plan to quit PPC advertising in near future, class auction lawsuit againt Yahoo is pending, Yahoo is losing PPC business, that`s why all those promo codes floating around ...