Just did a GOG survey that focused on the idea of a paid membership option on GOG. Seems they're determining what people would be willing to pay extra for. Some of the options were
- a tool for backing up offline installers
- ability to install previous versions of a game
- extra insight into the preservation work they're doing.
- voting rights on games to bring into the preservation program.
And others that I can't remember.
If the developers were interested in allowing people to keep the servers running, they'd just give us the server code like they used to. If I was in charge of a GOG that was a little more flush with capital, I might fund an easy drop-in replacement library for Steam's multiplayer APIs so that developers can easily port their games to GOG and be playable, in multiplayer, offline.