Saw this on OzBargain and it works for me.
Credits to billyliberty of reddit.
Free Joy Ride Turbo, a racing game similar to Mario Kart, for the Xbox One (and 360) by going to this link: Joy Ride Turbo
Select "enter codes" then enter the following information when prompted:
Bag 1 - 373315XXX 12:18 Bag 2 - 373315XXX 09:39
Change the three Xs for each "bag" to any random number, fill out the rest of the information, and wait for your free game code. Enjoy! This may not work on mobile and may require a PC browser.)
EDIT: This should work outside of the U.S. as well, as confirmed by /u/jakescond from Australia in the comments. Just use a U.S. zip code like 90210.
If it says that the promotion is over, try changing the 2 sets of 3 numbers you put in.
Worked, no problems, cheers.