This offer is only for those with a Kindle with Special Offers:
Save $5 on a $10 purchase at Amazon.com
Click on offer, then click on the link on the offer page to receive an email with the promotion code. Sign-up for this offer expires on August 20.
You'll get an email (right away), a link to the Special Offer page and a promotion code to enter at checkout. Once you have the promotional code, you have until September 20 to complete your purchase. Like previous offers, this one requires you to use the full checkout process in order to enter your promotional code. Also, like all Amazon sales that use promotional codes, if you have a gift card balance, you must use it for the payment (if there is not a sufficient balance, then you can pick which credit card or other payment to use).
This offer can be used more than once per account, so long as you have more than one KSO registered. Just click on the ad on each device to receive the individual promotion codes via email.
There are a few restrictions on this offer - no gift cards or digital products (including Kindle books). But, there is no restriction on adding this promotion onto any other valid promotion at Amazon, including the KSO offers, such as the $10 off Kindle Accessories offer that expires on Aug 19, the Save $5 on Kindle reading lights offer (stack all three and get some of the reading lights for free), the 50% off Kindle Lighted Cover offer, the Save $25 on Jewelry offer (net $30 off $50) or the Save $25 on Textbooks offer (yielding $30 off $100 if you were taking advantage of that one) or .... Well, you get the idea. Remember, too, if you don't have Prime shipping, that it's the total before the promotion codes are added that counts towards the $25 free shipping requirement, so even if the total ends up being under $25 (or even free), you shouldn't have to pay shipping on most items for these offers, either.