Roughly, what you shouldn't be able to do is distribute a product with that requires a contract in order to build upon it or extend it. You'd have to tease out

Roughly, what you shouldn't be able to do is distribute a product with that requires a contract in order to build upon it or extend it. You'd have to tease out the nuance of this more in legalese for sure, but that's the gist of it. The application to OS+software is a special case, the same principle applies in e.g. why Keurig's K-Cups DRM scheme should not be legal.