Weren't the last Witcher soundtracks made available on GOG? Yeah, I'd rather buy it there. Seems odd not to provide it DRM free.
So I guess every person here is asking for the exact same thing, and gonna keep it flowing until they release it.
Well, Spotify's standard version is for free. If you go premium, you get a few bonuses like better music quality, no commercials inside the app or ability to DL tracks and listen while offline(but still inside Spotify app). But as it's based on streaming, it's not really about "owning" the music.