eshark - 10:16 pm on Feb 2, 2005 (gmt 0)
Content search is off, but what poster_boy is talking about is different from content search. If I understand it correctly, it is these spammy sites running AdNonSense.
It could be .. but whyt is it only affecting one keyword and not others? And the change is very sudden after a few months just for that keyword. I think impression spamming is the most plausible explanation to me. And I learned something new -- I had no idea people would do that. I knew about the malicious clicks, not impression spam tho.
I'll update the thread once I get a response from Google which p[robably will take them a few days if past is any indication