You can get a free $5 Amazon VOD credit by Tweeting about it! Just follow these directions:
Go here and link your Twitter and Amazon accounts.
Follow all of the prompts and when you’re finished it will say “Congratulations! A $5 credit has been added to your account.”
Note that this will automatically have your Twitter account follow @amazonvideo and Tweet: “I just got a $5 credit for instant movies and TV shows @amazonvideo. Click http://amzn.to/hh8gTP to get yours. #get5.″
Thanks Rose Knows Coupons