The Dink Network

I'd imagine Steam would have some measure to let you download the games DRM free if they knew they were going to be destroyed, but it would probably be up to the devs which ones can be downloaded in that way. Even then, Steam and Gog would be the same in that you have the drm free games, but if Gog goes down, you can't go get those installers again if you need them, much like how you'd only have that one chance if Steam shut down.

Sure, Steam MAY be secure, but goddammit they ain't NASA or CIA, and even THESE GUYS got hacked into! So anything's possible!