In case anyone is wondering about which games qualify for the Overwatch trade deal in the new ad: https://www.gamestop.com/trade/Browse/N-0Z1z13laj?Ntt=otmay18&1
Like sonicguile said. I did $105 in certificates when I picked up my Project Scorpio Xbox One X. It also ends up saving more because you don't get taxed for what the certificate takes off either.
Sometimes they don't email you shipping for each package for whatever reason. If you log in to GameStop.com and click order status and then click on the order number itself, it will show all tracking numbers for that order.