Wicht
Hero
I'd point out that that's not actually true. After all, En World's 4e adventure paths are GSL licensed, which can be pulled.
Honestly, I'd say that the OGL forest has shrunk to a very small core. At least d20 OGL anyway. Other systems are going with some sort of open license, but, not d20. Name 3 new D20 games that aren't D&D related that have come out in the past two years. For a while there, EVERYTHING was d20 OGL. Now? I looked at the Hot Roleplaying Games list and only 2 of the top 10 games are new D20 - 13th Age and Numenara and those are pretty closely tied to D&D. Everything else is much older or not d20 at all. (Those two games are d20 aren't they?)
The days of OGL games being the forest are somewhat behind us. Fate, Savage Worlds, and others are spreading out now that the shadow of D20 seems to have past.
I am not convinced that the words you are using mean what you think they mean.
Fate is an OGL game. Savage Worlds is not an OGL game. But the number of non-d20 games that are Open has actually increased. The d20 license should not be confused with the OGL or other open licenses. They are not the same thing.
Also as to your first paragraph's point, I do believe I have seen Morrus recently say that the yanking of the 4e GSL would not be a welcome development. And if it did happen, I would have to think that more publishers would think twice before signing onto another such agreement.