This is a tad bit of a cross-post from my other blog, Wicked Things Horror Blog - yay, free stuff!!!
Simply log into your account, and Amazon will direct you to do the rest. Basically, you are Tweeting to let other people know about the credit. In doing this, Amazon is giving you free credit, but of course, this is smart advertising for Amazon. My, they are slick!
Amazon will automatically connect your Amazon.com and Twitter accounts. (If you are not already signed in, you will be prompted to do so).
It will also make you automatically follow @amazonvideo and @amazon_movies. The message "I just got a $5 credit for instant movies and TV shows @amazonvideo. Click http://amzn.to/oWmBFy to get yours. #get5" will be automatically tweeted from your Twitter account.
A Tale of Two Sisters (English subtitled) - highly recommended
Deadgirl (unrated) - highly recommended
The Uninvited - highly recommended
The Hunger - highly recommended
The Haunting of Molly Hartley - highly recommended
From Hell - highly recommended