Regarding Getty Images not filing any cases since 2008, there were at least two big events that might have something to do with it.
1. Getty Images ceased being a public company and went private. The were bought out by a private investment group. The private management group might have had some influence on that.
2. ELI came into existence and Oscar singularly became the "de facto" lead attorney on all things related to stock photo extortion letters. Further, Oscar is not operating traditionally as most law firms do in the representation of his clients with the extortion letters. Additionally, he has the tremendous advantage of community leverage behind him. If Getty Images were to directly face-off against Oscar and Oscar managed to score even one victory, it would be devastating for Getty Images from a PR point of view and set a dangerous precedent against GI.
Without giving anything specific away, let's just say if Oscar was forced or dragged into a legal fight on behalf of one of his clients, Oscar would not be a one-man show. There is something very unpleasant going up against a lawyer who has non-traditional resources at his disposal. It is even more risky going up against an attorney who "isn't just in it for the money".
Oscar is very respectful and professional but I would hate to go against him on a matter he is truly passionate about. For Getty Images and its employees, they fight only for the money. But push comes to shove, none of them would lay their name, reputation, or money over the fight whereas their opponents would.
Right now, we can all gripe and complain about Getty Images, but they have not yet crossed the line as Righthaven has with their crazy lawsuits. You can be sure if Getty Images ever pulls the trigger and files a lawsuit against a small-time blogger, hobbyist, mom-and-pop, or some other smaller interest, this forum and its social network will light up like an exploding Christmas tree.
Matthew