AdSense publishers are fed up with the spammy diet ads and make money ads. They are tired of trying to keep up with filtering those sites out individually (much like site negatives with content targeting) and they have asked for a better way to stop those ads so Google is going to give them the option to exclude entire categories from showing ads, much like category negatives in content targeting.
AdWords, The Content Network, and the Jet Stream: Free MP3
Perry Marshall & Harlan Kilstein in Conversation: Maximum AdWords Results on Google’s Content Network, via the “Jet Stream”.
Listen Here: (66min.)