Is there a known license where all derivative works must be made public?
Consider this: I give copyleft code to team X. Team X improves code and only shares/uses it internally. This situation is legal because team X is not sharing their derivative works with the world, therefore they are under no obligation to share the derivative code with the world (or even back to me). Please correct me if I'm wrong.
Is there a way to force the recipient to agree that derivative source code must be published somehow?