I purchased Bioshock 2 and did recieve and email from Amazon about the $10 credit
"We recently added a $10 Video Game Store Credit promotional offer to Bioshock 2. This credit has been automatically applied to your account. This promo credit may be redeemed until 4/30/2010."
However, I cannot get the $10 promo to be applied to any video game I have placed in my cart to order. What is the trick to getting the $10 off, is there a promo code i need to enter?...thanks for the help.