I was in the process of purchasing the game as gifts and refused after the second purchase. I made two purchases successfully, but was denied a third purchase. Something that would prevent this is having the ability to edit the quantity during purchase.
I called my bank at first, figuring their fraud prevention had stopped the repetitive purchases, however while on the phone with card service department I made the attempt again. The blockage was not at their end. The only conclusion I can make is that the store is programmed to refuse sales. Since I have the money in my account to make this purchase, I am confused as to the reason I am being denied an early Christmas present for a friend.
