If you are an author and self-publishing through Kindle Direct Publishing, you should fully understand this:
If you list your book under Kindle Select, (gives Kindle exclusivity for 90 days) your book will automatically be enrolled in Kindle Unlimited.
Kindle Unlimited is a complete ripoff for authors.
Kindle Books charges a subscription fee to readers. They get this money up front, and then allow readers to download author's books for free onto their Kindles. AUTHOR RECEIVE NO MONEY UNTIL THE BOOK IS BEING READ. AND THEN, YOU GET PAID PER PAGE READ. Do you understand this? Kindle gets money up front, allows your book to be downloaded, and if the book doesn't get read for two years, you don't get your money until then, and if it doesn't get read at all, you never receive your money.
Blazing Owl Press removed all of our books from Kindle Select, which means they've been removed from Kindle Unlimited as well, and we are already making more money.
Kindle Unlimited should be illegal. Kindle is accepting money via subscriptions that they get by promising free books that they don't own.
When I first enrolled my books under Kindle Select, I thought it meant only that each book would be exclusive to Amazon for 90 days. I also didn't realize that there was a Kindle Select automatic re-enrollment after the 90 days, which means that the exclusivity clause continues until you go into the screen for managing your account and manually turn off the auto renew.
BE VERY CAREFUL WHEN DEALING WITH AMAZON AND KINDLE DIRECT PUBLISHING, AUTHORS.
THEY ARE NOT ON YOUR SIDE.
They are trying to make a buck off of you – they will encourage you to give your books away, lend your books, and price them for next to nothing. Take a look at well-known authors who are actually making money – they do not sell their books for 99 cents. They do not give them away. Most of their books are not listed on Kindle Unlimited. There's a reason for that.
Don't be so desperate to publish your work that you allow publishers to rip you off. Learn from my mistakes.