Update: The $5 credit from this offer expires today!
If you are eligible you will have a $5 Kindle eBook credit to spend by 12/31.
If you are targeted you will see the $5 credit show up under the price of eBooks:
a free trial of Amazon Prime. A prime trial is also free with Amazon Family (which also gets you up to 20% off diapers among other benefits) or Amazon Student. EBT/Medicaid Cardholders can save on Prime Membership here.