Amazon always ships packages ahead of time, at my leisure, and often cheaper than retail. They always process returns and complaints in my favour, without contest. They reach out to local logistics companies in order to improve delivery, and I can tell by the fact that those companies now have branded vehicles (and much happier and more attentive personnel than UPS!), and better verification processes (they found a logistics provider that actually emails the signature given at the door to you when the delivery is processed) that they've done well out of that.
I feel they're serving me very well as a customer, and every ordinary person in my life who isn't competing with Amazon is richer and happier because of Amazon's services.
> definitely not ... the businesses on the platform
The businesses fulfilling through Amazon would absolutely not have received my business were it not for Amazon; in many cases they do not have the expertise to handle the orders correctly, and I do not trust all of them to process the payments securely to the degree that I trust Amazon to.
They have every opportunity to improve their ordering and fulfillment systems, but they choose Amazon because it's where the customers are comfortable already.
I dreamt of a logistics integration system much like Amazon Marketplace when I was 16, and every year they make it closer to that dream, I think it's great. I'm willing to accept an argument from concrete evidence that they have somehow deliberately and systematically broken the law in so doing, but I've yet to see it.