You have to jump through a bunch of hoops to get 70% out of of Amazon. In particular, you give up all pricing control -- not only do you have to agree to a ceil

You have to jump through a bunch of hoops to get 70% out of of Amazon. In particular, you give up all pricing control -- not only do you have to agree to a ceiling and floor price, but you have to agree not to sell for a lower or higher price elsewhere, and to allow Amazon to change their selling price at will. Which means if AMZN decide your book would make a really cool free promotional item, they can give away some tens of thousands of copies to draw customers in and pay you bupkis. Your book gets to be a loss-leader, and you're the loser.