I am one of those, who don't boycott Steam.
I did "boycott" it in its beginnings, though.
I was successfully ignoring Steam until late 2009.
That was when they gave "Portal" away for free.
I made my account literally "five minutes to midnight" (
the time the free offer endet), after I considered all day long, whether the game was worth the hassle (
spoiler: it was!).
While I appreciate the DRM-freeness of GOG, I don't want to miss out on some of the modern games.
In 2010 I searched for an old game, and stumbled over GOG.com.
Origin came next - by "accident" - I bought a game, and only found out after the purchase, that it was an Origin key.
Then came Uplay...I backed/preordered Might and Magic X...and that required Uplay.
So - I use all the "big" digital distributers, and, so far, encountered no problem with any of them.
But I can also say: of all the DDs, GOG is my most used, and my GOG shelf is better equipped then all the others together.