Prah: Well, I've been promoting GOG for some friends but also people on the internet in general. No idea how it has worked though, but hopefully well enough! :)
For 2015 I managed to finally convert 2 of my Steam only friends to purchase video games from gog.com, though they will still purchase video games from Steam.
But one of my friends friend got converted by him to purchase from gog.com and as soon as he tried gog.com for at least 1 month he decided to purchase exclusively from gog.com from now on.
He has a total of 20 video games only for now on his gog.com account and he said he will try to convert his friends as well.
sanfueg: So far, this year, I introduced two very good friends of mine to GOG. They haven't bought anything yet, and use Steam as a main platform. I did give them the first two Witcher games on GOG, since I had a lot of GOG keys from retail, Steam and GOG. Yes, I did buy the first two games on all mentioned above.
Whoa, we both converted 2 friends from Steam.