Amazon offers a no-rush shipping credit where you get a free credit to use on select categories when you choose a slower shipping option. The credit ranges from $1 to $10 and only works on select categories.
Check Your Available No-Rush Credits at this link
The most common offer is to get a $1 digital credit, applicable to select eBooks, digital music, videos, and apps from the Amazon Appstore. And you can even use multiple $1 credits on a single purchase. A known idea was to use the digital credits to buy XBOX, PSN and various other digital gift cards.
The news came in today on SD that Amazon has updated the terms for digital credits going forward, and the new credits don’t work anymore on digital gift cards.
Rewards may not be used for the purchase of software subscriptions.
Rewards may not be used for the purchase of software subscriptions, gift cards, digital video games or memberships.
The older digital credits with expiration date in September still continue to work on gift cards, but the new October credits are not working, as stated in the terms.
Bummer, only useful now if you’re interested in one of the regular digital items on Amazon’s Appstore.