Amazon will give you a free $1 MP3 credit for purchasing/renting a movie or TV show from Amazon Instant Video. If you weren’t planning to buy any media you can simply ‘purchase’ one of Amazon’s free offerings (like this one!) to qualify for this promo. You’ll receive an email once the credit has been applied to your account, which is usually within minutes. Pick from these $0.99 (or less) hit songs to get out the door without costing you a cent. Enjoy!