Amazon introduces Amazon Coins, its own virtual currency

A screen shot of Amazon's website shows the 'add to cart' button in this undated photo.

May 14, 2013 1:40:44 PM PDT
Amazon has its own form of virtual currency.

All registered users of Amazon's Kindle Fire e-book reader will receive 500 free coins. Each is valued at a penny.

The $5 in Amazon Coins can be used to buy games, apps and more.

Amazon is sending e-mails to people who are eligible for the coins.