For people who still believe the GPL and copyleft is useless, everybody does what they want anyway and corporations have already won: I'm working at a pretty big corporation. Our products are entirely proprietary. Nobody will ever know what's running on them. Copyleft code is still handled extremely strictly. With mandatory legal reviews for every package we want to add. And formal reprimands for everyone trying to slip one by legal. Of course the most unethical corps don't care.