Yeah, it's the people selling ad space that lose revenue, not the people buying it to show their ads. The system seems a bit self-destructive at the moment. Ad-space buyers keep making more obnoxious ads, raising click rates at the expense of the people trying to use the site. The users get fed up and install ad blockers, which harms the sites but not the ad networks. The sites themselves are squeezed in the middle, without much leverage to stop either obnoxious ads or people from blocking them.