I got it now too! I also got an email for plat of GTA V.
I got an email for getting the platinum in Watch Dogs 2 a few days after completion. I was surprised to see it. No extras but it is a nice touch. Hoping they continue to add more stats of our gameplay into the app and accounts as I love seeing all the different things i've done on xbox games with their detailed pages for each game.
- ritchardf likes this