You will need to be an Xbox Live Gold and EA Access subscriber to get this deal, but it's worth it if you collect points!
1) Open the rewards app and scroll down a bit, you'll see there's a few punch card deals - one of them is 2500 points for: buying at least 100 FIFA points ($0.89 for a gold member) and then playing FIFA 20. The title is pretty generic "Ultimate Holiday Punch Card", and the image is a green image that just says "SCORE MORE WITH XBOX".
2) Activate the punch card
3) Buy the points via the next box down - $0.89 for gold members, I think $0.99 for non-gold.
4) With EA access, you should be able to play any game for free for up to 10 hours without actually buying it -- so you can download/install FIFA and open it up to finish out collecting this deal.
5) Go back to the rewards app and verify you got your 2500 point bonus!
2500 points has a cash value of a bit less than $2.50 (it's 5250 points for a $5 gift card to various places), so this isn't a HUGE deal, but if you're collecting points and need a boost, especially to get you to a reward you particularly want, it's a nice shortcut.
Here's proof that it works: https://i.imgur.com/5BsqPc0.jpg