Because I don't pirate games to get a DRM free copy, I pirate games to try them out. GOG offering DRM free games doesn't change any aspect of my piracy what-so-ever.
Game comes out on GOG that I want? Cool, time to pirate it, play it, and make sure it A) runs correctly on my PC, and B) make sure the game isn't flame-broiled arse. If it's good and I enjoy it, then I will buy a copy and not a minute before.
I'm sure they do, amazingly my answer somehow doesn't change. Fancy that.
Edit: Downvotes mean nothing, I've seen what makes you cheer and this is a piracy community. Take that anti-pirate shite back to Reddit to the old community that does nothing but shit on things and post memes. We've never had a need to justify piracy and trying to shame people for it is some little-dick-bootlicker energy.
When I was a broke teenager I pirated games. But back then there wasn't any online play (80s).
Now I primarily pirate movies and TV shows. And most of that is ripping DVDs and Blu-ray discs, which I still buy when I really like something. Then supplement with torrents.
But I've never debated the ethics. Was it Thoreau that said something that the effect of, if you engage in civil disobedience, even against unjust laws, you must be ready to accept the consequences.