[quote name='Mark27']I did the same thing, I also traded in a game towards it. So hopefully they can credit the 10% to my card. Or at the very least, they should be able to cancel my pre-order and redo the whole thing, and still apply the trade-in too.[/quote]
i work at gs. whatever difference you have left over at pick up from usuing the coupon, you can use towards whatever you want...another game, another reserve, or they can just put it on a card.