+1 - I used GOG for the first time the other week to get a copy of Morrowind so I could see how https://openmw.org/ was these days, and it was a really good experience.
I did have to use some obscure tool to extract it being on Linux but it's nice to know I won't have to purchase another copy again. There's a number of games I've had to repeat purchase (mostly from disk to digital), and with modding the forced auto updates on steam can also be a pain
For Linux desktop gaming, Steam bests GoG all day, everyday.
Before Valve sponsoring/partnering with Code Weavers on Proton, running anything-but-old-and-stable games via Wine was a fraught affair, now even games that update weekly/monthly run perfectly, without having to fiddle with config files or downloading specific DLLs. For the large and growing library of supported games, Steam made Linux gaming painless.
GOG will sell you Linux versions of games. In fact it doesn't care - once you own it you can download all of the game files for all the platforms it was released for. However, it only sells you what actually exists. It doesn't take the Windows version and run it in a Windows emulation layer like Steam has. If you want to run the Windows version emulated on Linux, you're on your own.
Not on your own; you're with a community that supports running GOG games on that Windows emulation layer. Heroic can run most GOG games very well. Steam is more reliable because it's Valve itself that's behind it, but Heroic is not that far behind.
GOG is in bed with Amazon. I have over 130 games via GOG, only a handful I paid for -- right now I can only think of the Yakuza 0-6 collection that was priced so low I had to do it even though I played them all on a friend's xbox before. The rest are from Amazon's gifting of them to me via having a Prime account and Twitch account. Many are games I already bought and played on Steam, they're good games they're not just gifting trash. In any case, just like Epic and their mass of freely given games, it all but guarantees I never give those platforms a dime especially if I think a game will be gifted eventually. (It makes me hesitate sometimes on steam purchases too, which is probably part of the point, but I've got a giant backlog so buying can wait anyway, and it's a rare game that I want to buy and play right now.)
I'll continue supporting Steam over GOG for PC gaming, especially as a Linux user.
Honestly I find “they give away free games so I won’t use them” to be a weird take.
In any case, often with these free deals the developer is compensated according to how many installs the game gets. Number of installs during sales is also a metric that helps gain funding for future titles.
So if Epic/GOG give away a game you already have and like, taking the time to add it to your collection, installing and running it briefly may help the developer out.
I'm not sure if the misunderstanding is on my end or yours, but I don't see how you get "I won't use them" from my comment mentioning I have over 130 games on GOG alone. I just added 3 more. I've even played some because sometimes they give away a game I don't already have and wanted to play! But it's not a sustainable practice, it's not particularly healthy for the ecosystem, that's a problem. (Amazon's free Prime Gaming giveaways give the games on a mix of GOG, Amazon directly, Epic, or Legacy Games. I have no idea how much revenue GOG gets from the deal but I'd bet it's > $0 and it would probably hurt to suddenly go away.)
Valve doesn't feel the need to shovel free games at me to get me to use their services, they're right not to do so because their services are still the best and I'm not begrudgingly using them but happily using them. And again, especially for Linux, where they've given a great deal back to making it a viable gaming platform. For launchers, I use Lutris and Heroic to manage my non-Steam games from Epic, GOG, Amazon directly, Humble Bundle, and Itch.io. I tend to configure these to use the GE fork of proton, again something that wouldn't be where it is without Valve.
Having read your post again, it’s my misunderstanding.
But I disagree that it’s unsustainable or unhealthy for the ecosystem. It’s clearly a loss-leader designed to keep you engaging with the platform, yes, but it’s not necessarily worse for the developers or the platform than, say, a hugely-discounted Steam sale (or a subscription service like Gamepass).
Also if Steam started giving away games like Epic do I’m pretty sure they’d be adored for it.
