I get what you mean but that is not feasable, however, if we look back at the old multiplayer experience like in Unreal Tournament 2004, the company runs a master server, and the community runs the game servers.

The master server just lists the game servers and allows for a server browser. That is WAY less resource intensive and can be run almost indeffinately.

The master server for UT2004 ran continously for almost 20 years, and when Epic announce it was shutting down, a fan server was created and after a quick edit of the config file you can play UT2004 multiplayer exactly like it was in the past.

So let's go back to that model of multiplayer, it requires a bit of skill to set up your own server securely, but you'll have way more choice and less commitment of resources from the publisher making it available for longer at less cost.