Ads aren't an end to themselves. Back in the day they made possible free TV and well funded newspapers. Now they make it possible for even better informational services to be free
Amazon sent the DMCA on behalf of the copyright owners, I responded with the EULA and a up front response about what I was using my image for, saying if I was in violation I would terminate my image immediately. They said thanks for explaining the situation and I haven't heard anything since then.
