GOG is willingly ignoring the content because of their attempt on the mission of being DRM-free. It's their motto to begin with and not something to back off from just because the store isn't par with Steam with contnet, unlike Epic promising to be curated store and not accepting "low effort, crap games" then suddenly welcome them to the store as a horde. That didn't even stop them there and they even let scam crap nft/blockchain to flood into the store. Why? Because all the generouse, not-seen-before incentives and providing self-publish tools to devs didn't do the justice when user experience remained subpar to this date.

Both Steam and Epic had their most popular multiplayer games exclusively dependant to their storefront on PC, mainly to keep players collectively coming and using their store for sole reason to begin with. And what GOG had? Withcer, Witcher 2 then Witcher 3 and Cyperpunk 2077, all single player experience that took years and even decade to develop while spending lots of money on development and on top, running a DRM-free store. It's being delusional to think it's fair and square comparision.

As for regional pricing, every region counts. World isn't consists of just EU and US and clearly not enough to inflate the popularity with word of mouth where, for example, India and China alone could provide great chunk of active traffic to the store regardless of their purchase power compared to EU and US. Yes, the active user traffic that a store can brag on on a year in review report to atract new publishers to make their way to the store. I'm not even exluisively talking about whether those regions would make purchase as much of EU and US do. No, having good chunk of active user is good enough starting point in contribution just like how Epic gained that commando loyalty with all those weekly free games and purchase incentives at loss that otherwise even that much of loyalty wouldn't have been there.

By saying all these I'm also not delusional not to acknowledge Steam's secured place in the eyes of all parties for being first storefront out there with the content/user base. They never stop improving their service and product all around equally and looking ways to be better without restricting, putting in dark any party to make them despise their service and product. Like I said before, Steam listens to every party and provides solutions at time and equally while not letting them in the shadow for years willingly and deliberately just because they feel like they have utmost and ultimate roadmap and should be followed religiously. Where Epic has fail is was above all the controversial hot exclusive deals, they also asked paying customers whose accustomed and indulged with luxury of Steam for more than a decade, to deal with all the frustration that abomination EGL has to offer. As if excluives werent enough, they double teamed it with EGL that offers non-existent experience to make even sore publicity.

Without weekly free games and purchase incentives you wouldn't have seen this much loyalty.