Every time I hear a story like this (and there's one like every month) I wonder how we ended up here. The internet was meant to be this place where anyone could set up a website, run a business, and reach customers directly. Instead it has turned into a collection of walled gardens, where your existence and livelihood depend on the whims of an opaque algorithm.
Luckily in my country Amazon does not have the level of market control it has in the US and some other places. People still walk or drive to local shops and when they order something for delivery they usually do so from their websites.
But reading many of these HN threads gives the impression that in the US and elsewhere Amazon controls a huge share of the market. If it functions as such a powerful exchange for both merchants and buyers, should there not be regulation to prevent injustices like this?