The realistic question is how would you enforce something like that, the recent push for age verification has been terrible for privacy and security.
doublah
The problem is GOG gatekeeping a lot of indies, he even mentions it as a good thing in this very article.
What profit? I can guarantee that Valve has spent far more in hiring hundreds of highly skilled full time contractors for 5+ years than they've made from the 3% of Steam's users on Linux.
Obviously it's a long term strategy for them to eventually make money but we've only gained from their investment.
The problem is these stores (Epic but also the Microsoft Store and Amazon's PC game store) only come along because some executive says "hey what if instead of Valve taking a cut from most PC games, we took a cut from most PC games", there's 0 interest or intent for them to be competition (as seen by the exclusives) for Steam or improve the developer/user experience.
Any time these massive companies offer a cheaper subsidised alternative to any existing product it's to push out the smaller players with less resources and build their own monopoly.
Well it's not GAAS(yet), it has 0 mtx so far.
They use regional companies I think, for Europe they use French chocolate (la maison du chocolat).
Luckily for you, there's more games without any loot boxes or micro transactions than you can play in your lifetime.
They don't "provide hooks" though, Heroic's Galaxy integration is reverse-engineered and could break at any point that GOG update how they do things. Providing a downloadable installer is nice for some people I'm sure, but most people just want to download the game quickly and easily with features like cloud saves available.