[DNSB]

An interesting comment. One author my wife loves pulled her books from KU for somewat similar economic reasons. The payment per book did not make up for the income loss from sales at other bookstores. It wasn't a great difference but she estimated her income dropped by ~8% when her books were on KU and not available on other bookstores. She mentioned dropping a book to anything from $1.99 to free on sites such as Bookbub for a short time worked better for boosting sales of other books in a series. Evidently KU readers would wait for the next book in a series to become available on KU and not actually spend the money to purchase it.