So this is a bit confusing. I thought this meant first time ordering with an Amex but apparently it is first time customer only, but have to pay with Amex. So no free $20 for me.
I would try calling the store if you havent received confirmation email in a while. I set one to hold yesterday and I never got an email saying they were holding it so i called the store when I got off work and they said they got the request and its being held with my name on it.
Thanks OP. Got a used one and the kind gamestop employee reminded me that he could get me a $5 off any used coupon with my unused points on my account. May have been one of the more pleasant Gamestop interactions i have ever had.
Was able to PM at Best Buy. Wasnt sure but i loved xcom and fire emblem which are the games getting associated with this one the most so i figured it was worth a shot. Thanks op.