timppu: Do you believe that selling Steam keys on the side can be only beneficial to GOG, also in the long run? Why isn't Origin selling Steam keys then?
It all boils down to whether the store believes and is ready to invest in its own service and infrastructure, or wants to make the quick buck by merely selling keys to other services. Origin and GOG have chosen to invest in their own service (including multiplayer support etc.), while e.g. GamersGate and GMG seem to mostly have given up with their own service, and decided to continue as mere key sellers. I don't expect them to invest on their service anymore, like coming up with an improved client, multiplayer support etc. No, people go to those places anymore just to buy Steam keys, that's all. They've made their own service irrelevant by promoting Steam.
synfresh: The difference comparing Origin (EA) and GoG is that Origin doesn't sell steam keys but they do sell origin keys on services other than their own (Amazon, GMG, etc). GoG doesn't have self published games to sell at other stores to drive traffic to GoG. I don't know if it would be beneficial to GoG to sell Steam keys, I'm sure it would increase traffic to the site in general. The better question is why doesn't GoG distribute GoG keys to other distributors in order to increase traffic (and brand recognition)?
SpooferJahk: GOG giving an option to play something they sold you on a competitor? That's an interesting concept...
synfresh: Why does GoG care where you 'play' the game you purchased from them? You don't play a game on GoG when you buy it from them (at least not until Galaxy gets here). In fact you can add GoG games as a non-Steam game to the steam client.
What I said was sarcasm that meant that it is ridiculous to expect GOG to allow someone to register a product they sold you on a competitor's client. If you add it as a non-Steam game, that's okay, but just saying that being able to activate a GOG game on Steam is kind of a ridiculous idea from a competition standpoint.