Doesn't have to be a monthly payment. If you can give me an EoL in the store page and sell it to me as a license, I'm happy. What sucks is that games currently get killed when the corpo decides. Without regulation, as with everything else, it'll slowly but surely go towards:

"We released MyGame 3 a month ago, sales aren't looking great, announce EoL for MyGame 1 we released 6 years ago to get those bums off it." (or the more charitable version where money's tight and the AWS costs aren't helping)