I use GOG since 2012. GOG gives us a lot of free stuff initially. But then they gave me Fallout, Duke3d, Torchlight, Shadow Warrior and Stargunner for free. To show my gratitude I bought 'I Have No Mouth And I Must Scream' almost 8 years ago. This is a game version of a short novel and it's pretty good.
Since then GOG is my "go to" platform.