I played Temtem with the "streaming with ads" functionality and it is a good use case for it
I purchased Temtem in a sale a month ago and didn't bother to start it then. I started the game today and I just discovered it is a paid, always online game. I tried refunding it but the refund period was already over. Of course it is my fault, because I checked the store page and there is stated that the game needs a Gamepass subscription, which for the moment I don't have.
Then I noticed the game can be streamed with ads and I thought well, why not since I already purchased it. It worked very well and the pop-up to subscribe to Gamepass did not appear. That way, I managed to play this game that requires a Gamepass subscription. I don't know if there many games in that situation, where you can stream an owned game with this service, but it is good as option to make a game playable without spending more money.