Found this in the coop ads: http://www.ablefind.com/ Do a view source: This is a one page site with hidden layers and links that redirect to another site called shopenjoy.com or something similar... I wasn't about to let the secondary site load fully but it seems a bit dodgy to me. The original page also contains AdSense -- I suspect it violates the TOS for AdSense as well. If I'm being overly suspicious, I apologize to the site owner in advance.
Agreed... The ad has been knocked out of the system. I also went and reviewed the owner's site they run co-op ads on for compliance, but that site is fine.