I started to look for some new games to play on Xbox Game Pass, and a pop up screen appeared, before the games, on my Xbox One. It states to play any Xbox Pass game and get a $5 Xbox Gift card, delivered within 4 weeks. I don't know if it was targeted or for everyone, which is why I put YMMV. You must have a subscription to Xbox Game Pass.
Note: Remember to try it on your Xbox One. I put the link for reference purposes ONLY.