I think that is exactly what they will do. They are going to shore up partnerships with the most consequential 3PPs (and probably other content creators) and thus be able to claim they aren't killing Open Gaming when they are. You really can't blame a company like Kobold for getting on board, either, given the vast majority of their revenue is generated from 5e compatible OGL content.If I were WoTC, determined to destroy Open Gaming, and thinking evil-rational, I would indeed be offering VERY generous (NDA'd) bespoke licence terms to Paizo, Kobold Press, and other major players. It would be worth spending millions of $ now to neutralise them as opponents.
That's what the rational Evil Overlord would do. But it's a funny thing, even IRL, few villains act with that kind of cold rationality. Everything I'm hearing indicates that WoTC leadership is thinking more like Gollum when Bilbo took the Ring. They think Paizo "stole their IP" and they are "out for blood". Apparently this kind of seemingly deranged attitude can actually impress investors, at least until the consequences become clear. They seem much more Putin 2022 than Putin 2012, to use a political analogy.