Amazon authors who publish via the company’s KDP platform have the option of enrolling in a program called KDP Select, which allows Amazon Prime members to borrow their books for free. Each time someone downloads/borrows the author’s book, the author is given an amount that varies from month to month.
In May, these authors earned $2.26 per borrow.
How is this number determined? Each month there is a KDP Select fund of a certain amount, usually $600,000. After every month, the total number of borrows/downloads for the KDP Select books is tallied up. For the sake of easy arithmetic, let’s say that there were 200,000 downloads of KDP Select books. This means that for that month, all authors would get $3 per book borrow ($600,000/200,000 = $3). If the author’s books had been downloaded 100 times, the author would get $300 for that month, and this number does not include regular sales of the ebook.
Amazon also said that 22 of the top 100 bestselling Kindle books are exclusive to Amazon via KDP Select.