All you have to do is –
- Connect you Amazon and Twitter accounts
- Follow @amazonappstore, if you aren’t already. An automated tweet will be sent from your account, which goes like “I just got a $2 credit for Android apps from the @amazonappstore. Click http://amzn.to/tweetapps2 to get yours. #get2″.
- Go select your app/game, look for ‘Redeem a gift card or a promotion code’. Your code will be applied automatically
$2 sounds paltry, but well, ain’t it ok you get it just for tweeting once.