Amazon doesn’t “run” (control) any market. They have a hand in retailing, logistics, web services, media, etc, but in each one, there are notable competitors.

Amazon doesn’t “run” (control) any market. They have a hand in retailing, logistics, web services, media, etc, but in each one, there are notable competitors. Not unlike other conglomerates, like Berkshire. But AWS’ big profit margins give Amazon a big upside.