In exchange for special legal rights to market the author’s eBook, Amazon delivers incentives to your author, for instance promotional equipment, like Kindle Unrestricted, And maybe larger royalty rates. You don’t need to spend A huge number of dollars to a self-publishing services company to publish your book on Amazon. https://maplepublishers.com/blog/why-opt-for-self-publishing-is-it-only-for-creative-independence-or-something-more/