> Not nearly enough ads were replaced by Contributor. Worse, it was the more innocuous ones that were replaced, while the most obnoxious blared on through.

That was a serious problem, I agree, and not one we could do anything about at the time. The problem was, those more-obnoxious ads were mainly not served by Google in the first place.

(There may have been a period when Contributor only worked on a subset of Google's ad products, mostly for technical reasons.)