Most of my games come from Humble Bundle, or steam sales

Once upon a time, I used to be an avid user of G2A, which is a third-party key site. But when Steam added the ability of being able to return video games that are purchased for a party, I stopped using this site as often because it’s usually more cost effective for me to spend a dollar or two more and be able to return the game if it’s a lemon.

I do still troll through fanatical, though, every once and awhile they drop some amazing bundles.