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sem4u - 1:41 pm on Mar 22, 2007 (gmt 0)
Google claims that its discard rate is less than 10 percent and that its click fraud rate is in the single digits, or 9 percent or less. Click Forensics, which provides click fraud services and operates a Click Fraud Index survey of advertisers and agencies, pegs the click fraud rate for the top tier search engines at just under 12 percent. I found this comaprison between Google & Yahoo interesting. If Reggie Davis wants someone to send him a list of URLs sending traffic with suspicious click activity then I would be more than happy to send them to him.
Yahoo does seem to be very slowly moving in the right direction with click fraud issues, but is a long way behind Google IMO. However, Davis said the "discard rate," or percentage of clicks that for some reason or another were problematic and thus the advertiser is not billed, averaged between 12 percent and 15 percent at Yahoo. The rate of fraudulent clicks, those designed only to run up charges to the advertiser, is a "subset" of that total discard rate, he said.