Ah, of course, I knew I was forgetting one. They did start that way although they've branched out since then. For example they sell Everspace 2, which is a much newer game.
They actually might be my favorite since all the games they sell are DRM-free. You can download the installer of every one of their games locally and they'll run "forever" without any dependency on GOG or their Galaxy library app (unlike Steam). Though their selection is more limited since IIRC they manually review every game they list.
However, even they tend to favor their "in-house" games (they're a sibling company of CDPR which developed the Witcher games and Cyberpunk 2077 and you'll frequently see those featured prominently there). Not as bad as Epic, though. More in the style of how Steam advertised Half Life 2 and Portal in the early days of Steam.
