Well the third-party launchers is extremely annoying, I have to say. Buying a game on Steam and then it forcing you to install yet another launcher (I have like 8 on my gaming PC now) really pisses me off.
I tend to buy on GOG now if I have the choice because they don't stand for that kind of shit nor DRM either.
I also really love the overview of GOG of the games you have in different launchers. Before that it happened to me multiple times that I bought a game on sale without realising I had already bought it on another platform years ago on another sale. Oops.
Ethics, features that are actually great for me instead of stuff that's just great for them. Love it. Reminds me a lot of a company that used to be like that. It was called Valve I think.