"To ward off concerns over margins, Amazon is offering SBA sellers a minimum gross proceed — which guarantees set profit for sellers based on a set selling price, even if Amazon lowers the price — for each product. The catch: Amazon wrote in its FAQ about SBA that MGP would be revisited “typically once every six months,” and that brands would have seven days to accept the new MGP, or reject it and deactivate a product from SBA."

This is literally price fixing.

Furthermore, Amazon hasn't lowered the price of anything not already in-process of technological price changes (like e-readers); if prices are lower it's because the margins shrank, the quality was reduced or the overall tech advanced without Amazons help.

Since they've earned literally half of their past 12 years of Net Income in 2018 alone, it's difficult to reason how they have cut the cost of anything while not making money, nor producing products through greater economies of scale than existing suppliers, while acquiring billions upon billions worth of logistics assets, another billions upon billions of business subsidiaries, and somehow had enough free cash flow to create robots, pay decent wages (even for shitty work environments) and still provide Jeff Bezos with enough money to buy almost equal number of businesses under the Bezos Expedition banner.

Amazon is a fraud, Jeff was a VP on Wall Street before he became a fake ass tech guru, and he and his cronies have been pumping up the stock price fraudulently as a means of providing cash through the sale of treasury stock and because interest rates have been so low since the financial crisis that investors will let them.