First of all, as other already pointed, no, nobody expects a publisher to support their game forever. Just give us the tools to do so ourselves. Second of all,

First of all, as other already pointed, no, nobody expects a publisher to support their game forever. Just give us the tools to do so ourselves. Second of all, it's not just multiplayer games that do that. Single-player games and modes can also be designed this way, so when the servers get shut down, you can't play the game at all. Not ever the single-player. There is no reason for this scheme to exist, plain and simple.