It looks as though Amazon is serious in its battle with book stuffers, shutting down a number of them recently. The link below is to an article that takes a look at some of the action taken.
For more visit:
https://www.bookworks.com/2018/06/book-stuffing-scams-kindle-unlimited/
The link below reports on the scam of bestseller lists – generally speaking of course.
For more visit:
http://goodereader.com/blog/electronic-readers/buying-your-way-up-the-bestseller-list/
The link below is to an article that looks at the pricing of ebooks and the attempted pricing scam by various publishers.
For more visit:
http://www.pcmag.com/article2/0,2817,2409431,00.asp
At the BookShelf 