For a limited time (February 23, 2015 - December 31, 2015), Amazon is offering $1 free MP3 credit if you download one of a few applications. The trick here is that they offer a bunch of free apps, among some paid apps. Simply choose one of the free apps (Pandora, TuneIn Radio, Vevo, Shazam, Soundcloud, etc.) and get your free $1 MP3 credit. There's no payment needed and you don't even have to download the app! Here's the steps needed: Create an Amazon account if you don't already have one Access the special free mp3 credit landing page Select one of the free apps (or buy an app if you really want), here's a few of the popular free ones (Pandora, Fruit Ninja, Shazam, Pandora and Temple Run 2) Click on one: If you're logged-in, you'll see a 'buy' button and the price is $0.00 - click the button and you should get your credit within a matter of minutes. You must redeem your free MP3 credit by January 31, 2016 . It's basically go...