That was my initial thought as well, but on second thought it does not seem like such a good idea to provide binaries that will never get patched for a public-facing service. Sure, not the company’s issue anymore, but still…
It might make a community rewrite of the server code easier, but that would likely only be attempted for very few games.
It doesn't need to be public-facing. The point is not to be able to continue playing as if the game was still being supported, it's to be able to continue playing at all, in some way. You can set up a box at home and let two or three of your friends in through a VPN. Security is not a concern.