Click fraud is growing, according to a report quoted by PaidContent.org

Another report makes it harder for search portals to deny click fraud as a growing concern. According to the Click Forensics study, fraudulent clicks on search-related online ads rose to an average of 14.1 percent last quarter, up from 13.7 percent in the first quarter. Earlier this month, advisory firm Outsell interviewed advertisers and estimated the rate as closer to 14.6 percent, or $800 million lost in revenue a year.