Yes, Steam, Origin, GOG Galaxy, Epic Games Store, plenty of digital store fronts offer games that you only have to pay for once and it doesn't cost anything to sign up for them.
If you're asking if anyone still does physical releases for PC games still, no. Even if the game is sold at a physical retail store, often it's just a DVD case with a code inside or something like a gift card that you have to redeem on one of those store fronts