It turns out that we recently bought a new car, and afterward, I looked up the owner's manual on the manufacturer's website. Now, I get the same ad over and over every day I'm on Sherdog for the car I already own. Google gets paid for delivering the ad, and I don't have to put up with ads for all sorts of different stuff I don't want, but the company paying for the ad gets nothing whatsoever for its money. Interesting. But should anyone care?