See App Store guidelines section 4.2.7:
"The app must only connect to a user-owned host device that is a personal computer or dedicated game console owned by the user, and both the host device and client must be connected on a local and LAN-based network."
(iOS steam link is local network only)
So, they can transfer "ownership" to me whenever I use my personal computer that happens to be located in Google's cloud which, through a series of tubes, is in fact connected to my LAN-based network.
This is just pure monopolistic behavior, nothing less.
And I really don't see how there's any sort of difference whether the game console that's streaming the game is owned by the person or sits in some datacenter somewhere. It's practically the same experience from the user's perspective.
Disclaimer: MSFT employee, not in Xbox, all views are my own, etc.
https://www.theverge.com/2018/5/24/17392470/apple-rejects-va...