Morrus said:
Unless I have totally misunderstood the phrasing of your post, that is bad advice. They can attach any conditions they like to the GSL; you can voluntarily agree to them or not - but if you don't, you don't get to play with the GSL. They're not "taking away" any "rights"; they're asking you to voluntarily not do something, and in return, they'll give you a new toy to play with.
If you go back to playing with the old toy, they say they won't let you play with the new toy any more. That doesn't take a way any rights you previously had.
They can't make it impossible to use the OGL; they merely make it an unattractive option, based on the assumption that the GSL offers greater value. Of course, each publisher decides that for himself.
I just wanted to respond to this point (okay, and make a couple of other comments...). I have a friend that does IP law as a part of his practice, and I talk to him every once and a while about the OGL and have been talking about the GSL recently. He's a gamer.
He told me (actually, he first told me that if I spoke about this, I should mention that this is not legal advice) that the attempts to remove your rights to publish under the OGL are going to be extremely problematic to enforce, because it's so very hard to give up any rights, even when you explicitly sign something that strongly implies you have.
His other thoughts were that WotC has had lawyers (a team of them, most likely) write this who aren't gamers, and that it was sad, because there are a lot of good lawyers out there who do game (something about there being a lot of 'rules lawyers' who actually
are law trained...). Many of the issues with the GSL would likely be solved if the people who wrote it actually knew about gaming and what's involved.
He finally told me that if I were to publish and had problems with it, he'd represent me...he saw a number of problems with how it's written. At the same time, he told me that if WotC called and wanted to represent them as part of an action, he would be happy to do so as well, especially if they would move him out to Seattle in order to do so. So you can take that for what it's worth.
--Steve
EDIT: I just wanted to add, that I'm not saying "just do what you want with the GSL and with a good lawyer, you'll be fine." That would be a spectacularly bad idea. I've read the license, and it's pretty obvious what the intent is with it. If I were to publish under it, I'd have to be okay with what that intent was, rather than attempting to skirt the intent of the license. You're much less likely to get into trouble with the specifics of a license if you just go and follow its spirit to begin with.