> we don't buy property when we buy a multiplayer game. Not unless you are fine going back to couch co-op.

Again, you're taking as a given one of the things which some people want to change. Why shouldn't the developers of the newest matchmaking-based shooter be required to release the binary for a dedicated server when they shut the game down? Obviously this won't be feasible for some games, but I can imagine plenty of games where it seems like it should be reasonable to factor it into development costs.

Why can't the single player functionality continue working indefinitely?

And maybe we can also mandate that companies release detailed server specifications when they turn down a game. Everything that might be needed for someone to rewrite the server. Then someone else might step into a breach - a different company, an open source project - and continue providing the service.