here was my situation
Me

romotional credit change
Bhoopalan:Hello, my name is Bhoopalan. How may I help you?
Me:Hello, I noticed that when I had placed the order for L.A. Noire, there was a $15 promotional credit. I see now that it has increased to $20. Is there any way I could receive those extra $5?
Bhoopalan:Can you hold for a minute or two while I research this for you?
Me

k
Bhoopalan:I'm sorry, Justin. In order to take advantage of this promotion, you must have placed a qualifying order during the specified promotion period. We're unable to apply special discounts to items ordered before or after the dates of the promotional offer.
However, as an exception, I'm issuing you a $5 promotional gift certificate
Me:Thank you.
Bhoopalan:Is that Okay?
Please hold on a minute or two while I do this for you.
I've issued you a $5 promotional certificate, which you can use the next time you order an item shipped and sold by Amazon.com.
You'll see your available promotional balance at checkout--this amount will be applied to your next order automatically without entering a claim code.
Your promotional balance doesn't appear in Your Account but will always display when you place an order.
Me:Ok, thank you.
Bhoopalan:For more information about using your promotional certificate, including the terms and conditions for using the certificate, visit our Help pages:
www.amazon.com/help/promotionalcertificate
Is there anything else I can do for you?
Me:No that is all
Bhoopalan:Thanks for visiting Amazon.com. We hope to see you again soon!