Click the button that says "Tweet and get $2" and you'll get a $2 credit to spend on apps in the Amazon Appstore for Android.
Connect your Amazon.com and Twitter accounts.
If you are not already signed in, you will be prompted to do so.
Automatically follow @amazonappstore on Twitter.
The message "I just got a $2 credit for Android apps from the @amazonappstore. Click http://amzn.to/tweetapps2 to get yours. #get2" will be automatically tweeted from your Twitter account.
If you are already following @amazonappstore, you are still eligible to receive this promotion. Your credit will automatically be applied to your purchase.