itch.io

The problem is that this model isn't profitable right now. Video games are a very saturated market, and the limitations you initially set don't seem realistic to me, in the sense that adhering to them would reach a wider audience or generate more profit than a game without those limitations.

EDIT:

I just read your other messages, and it seems you're talking about creating a site where you sell hosting with those characteristics.

The problem is, what do you offer in return?

Unless you have users (And somehow, you pay money to the developers for the people who play.), it's very difficult to offer something that will attract developers to create content with those limitations.

Unless you're as big as Steam, nobody is going to pay to get on your platform.  If you're smaller than itch, you may actually have to pay an advance on royalties in order to interest developers.