There was a story on HN the other day about someone who had definitely had success with targeted advertising. A company called Grasshopper, I think. It wasn&#x27;t the first one.<p>The problem is that although these stories exist, they&#x27;re so rare. Drops in the ocean. All they say is that highly targeted advertising definitely works for a small part of one per cent of the advertisers.<p>(Which isn&#x27;t to say that it <i>doesn&#x27;t</i> work for more. Maybe it does, I wouldn&#x27;t know.)