Aspirinsmurf
Hero
Oh, they can. But nobody is going to, at least not before this "playtest" thing is over and WotC actually make a decision about what make-believe fairy tale wording they're going to go with to try to convince people that they haven't broken the law.I'm given to understand that a publisher can't proactively go to court to assert that the OGL v1.0a is not revoked, which strikes me as unfortunate. Essentially, they have to keep publishing (new?) OGL v1.0a content after WotC's declared date of revocation, and wait for WotC to take legal action against them. Only then can they assert in court that the license is still in effect.
I suspect the kill-switch will end up in some obscure EULA somewhere (not necessarily a WotC EULA, but like Kickstarter or something), a clause in where you actually agree that the OGL 1.0(a) is "unauthorized" for you to use specifically. I don't think they have much of a case otherwise, and this certainly looks like what they tried to do with the sweetheart deals earlier.