Yeah, but the fact that Lutris allows to do that painlessly is neither GoG nor the game dev doing. The game dev made a game for a different OS than mine, old enough games I can excuse, but all major engines have supported Linux for a while now, so I don’t feel particularly morally obligated to give money to someone who made a statement that they don’t care about me playing their game. On the other hand GoG also did nothing other than provide a store, and game devs could just sell their DRM free copies on their own websites and bypass GoG entirely, the convenience GoG sells goes out of the window if I can’t access it and I have to rely on a third party app to make it convenient.

That being said, there are amazing games that have native versions and sell DRM free copies on their website and I strongly encourage anyone to buy directly from them, for example Factorio, RimWorld or Project Zomboid. Other games don’t sell on their own websites but do provide Linux versions on GoG, like Dead Cells or SOMA, I definitely see the point of buying there to give money to the devs. But for devs that don’t care about me, and a store that treat me as a second class citizen.

Valve invests the fee onto improvements to wine, dxvk, FEX, as well as the features they offer like Steam client, cloud saves, etc. They invested money that allows me to play non native games easily, so to play those games I’m okay to pay Valve for it, they’re the ones that allow me to play them. But neither GoG nor game devs that don’t care about Linux want my money so I don’t care about them either.