> And if you think about it, it does make financial sense for them to forbid streaming. As-is, I am sharing one purchased copy of the game with my friends. We have one cheap GPU server with Hetzner and we take turns playing the games. Or we play a couch-coop game online with multiple Gamepads connected to that one server. If you prevent this form of sharing, each of us would have needed to purchase a copy of the game to install locally, so the publisher is potentially losing money by tolerating game streaming.

You can essentially do all of this with Steam anyway. You can use the Steam Family Sharing to share your video games like that if you're playing at different times. And you can use Let's Play Together to all remote to the same computer and play split screen.