Ad spending on pay-per-click ads will stall this year, a survey of advertisers by market research firm Outsell found. Outsell forecast online spending for pay-per-click ads will fall 1 percent in 2007. Click fraud concerns are a driver in pay-per-click
Fraud Fears Likely Slow Spending On Pay-Per-Click Ads
Summary:
Ad spending on pay-per-click ads will stall this year, a survey of advertisers by market research firm Outsell found. Outsell forecast onlin…
Worth noting that Yahoo! seems to be most affected by this:
http://www.internetoutsider.com/2007/01/yahoo_advertise.html