Amazon - often picks all the suppliers, and lets the buyer decide which they prefer. Also - they deal in finished (consumer) goods. There is a whole lot of coo

Amazon - often picks all the suppliers, and lets the buyer decide which they prefer. Also - they deal in finished (consumer) goods. There is a whole lot of coordination before that stuff gets assembled and ready for Amazon or one or their marketplace suppliers to ship it. Maybe they've integrated the demand chain logistics, but not the integration supply chain. And they don't dictate that consumers get to purchase one and only one brand of whatever product (like peanut butter).