Found this noted on another site.
If you sign up at scottbrand.com you get a free $5 MP3 credit at amazon. This is a decent credit actually, I havnt seen amazon give this high of a value in a while.
Once you sign up, you have to go back to the same url again and answer 1 question and it will give you the code. The code must be redeemed before 1/31/13.
***My recommendation, use a temp email like I always do for this to avoid spam such as 10minutemail.com***