Buy the game.

Since I don't play very often and only a small number of games, I prefer to buy licensed versions because I buy them to play, not to waste time with cracks, keygens, messing around with the registry, online registrations, etc. + patches, updates, and additional content are installed without any headaches.
In other words, I'm willing to pay for the service, including for a boxed version with a disc, because I don't buy digital versions in principle.
I've only downloaded a couple of old games a few times, just for nostalgia, or ports from consoles like Resident Evil, which were never released on PC.