When games that are live service, or rely heavily on servers get cut off, they should at the very least release the server code so others can continue hosting it.
Stop being afraid of open source and embrace it. Too many games will be lost to greed.
Duelyst is a wonderful recent example of how to do it right.
Imagine instead of the complete brutal removal from stores and shutdown that Epic Games are doing with Unreal Tournament, if Tim Sweeney fully open sourced the original. Imagine the fun people could have with such gaming history.
https://www.gamingonlinux.com/2022/12/epic-games-are-killing-off-a-bunch-of-classics-like-unreal-tournament/