On the Microsoft Rewards app on Xbox, there is a punch card for 2500 points, for buying a minimum of 100 FIFA points (99 cents). The other activities are just for clicking the activities.
So, you can redeem a $1.25 Xbox GC for 1,600 points, buy the FIFA points, with that, and you'll get 2,500 points in return.
You could also buy the points for 99 cents, or if you have EA Access (or redeem a 1-month free trial), you can buy them for 89 cents.
You do not need to own FIFA 20 for this. It worked for me, and I do not own the game.
So the steps are:
- Redeem a $1.25 Xbox GC for 1,600 Microsoft Rewards Points
- Purchase 100 FIFA Points
- Complete the Punch Card on the Microsoft Rewards Xbox App