europeforvisitors - 10:01 pm on Jun 15, 2004 (gmt 0)
Additionally - this type of site does impact revenue for the better quality sites in the program. The budgets of advertisers are used up on the sewer sites, leading to less money available for the quality sites.
That probably doesn't matter to Google. A bigger issue, from Google's point of view, may be whether the presence of "Ads by Google" on such sites will make content ads less acceptable to advertisers--many of whom are already skeptical of content ads, and some of whom (corporate advertisers ad ad agencies) wouldn't dream of having their ads run just anywhere in the "real world."