Through October 24th, you can score a FREE $2 Amazon Gift Card when you enter 4 My Coke Rewards codes! Just head here, sign in, and scroll down to the “Stock up on Coke with a $50 Amazon.com Gift Card” field. Note that there is a limit of one per person. First 25,000 and once all have been claimed, you’ll get an e-mail to claim your reward.