A few thoughts. Firstly, no objections to anything in your post. But, Coldcard's license doesn't stop anyone from sharing their ideas or suggesting modifications to Coinkite. What they can't do is create their own products based on that code and sell it. This is a douchebag move by their team , I have no doubt about that. If you don't want to have anything to do with Coinkite or their developers, that's fine. But you could work on the code if you wanted to. And the end-user who is not interested in building and selling software, but verifying it and checking the code, can do that.