Pheace: Marketing element or not, the #NoDRM campaign was a result of the horrible XboxOne press conference. I'm sure they went with that for the Summer sale because of what happened to Microsoft. It's a great way to drag in a new crowd that would before have been unaware of GOG, simply because of the popularity of the hashtag right now.
Ah. I see. I don't really follow E3 events. But doesn't this kind of sale should be planned before even Microsoft do XboxOne press conference ? but, yes, perhaps #NoDRM is used by GOG in a way you said.
That is why I said : marketing element. To market the GOG brand itself. As the core value of GOG is No DRM from the very beginning. Well, any Blue text person could explain to us more clearly about this matter.