The authors of packaged books are generally contracted as «work for hire»; that is, they are paid a flat fee and do not get paid royalties on the book sales. (thebalancecareers.com)
However they also offer a 20 percent royalty on books sold through third party platforms, which is twice the amount offered by most other publishing services. (amyharrop.com)
It would suck to only receive 35 % royalty on a book priced between $ 2.99 and $ 9.99 when you could be earning twice as much! (sarracannon.com)