That's really shitty lol. Ideally these services shouldn't need per-game approval at all. If anything they are a benefit to the publishers as it increases the audience they can sell to, those without a console or gaming pc. They still get paid so not sure why any third party would have an issue with it unless they were running their own cloud service. Having control like this opens the door for publishers to accept money-hats from cloud services like GFN, Boosteroid etc for exclusivity. So them making even more money. Charging you for the game as normal still and then charging the cloud provider too.
If you pay $70 for a PC game you should be allowed to play it on any PC, even a remote one.