No they haven't, which is exactly why you go for iron-clad language. 1) it keeps them honest and GUARANTEES they won't experiment with it, and 2) if they're honest about having no interest or need in code sharing, etc, then it should be a relatively cheap item to obtain, much like furlough protection in a time like this. After all, if they aren't going to need it, why would they not sign off on protective language?