Amazon makes so much money off of this scam that it doesn't have to pay *anything* to ship its own goods - the profits from overcharging merchants for "fulfillment by Amazon" pay for *all* the shipping, on *everything* Amazon sells:
https://cdn.ilsr.org/wp-content/uploads/2023/03/AmazonMonopolyTollbooth-2023.pdf
Amazon competes with its own sellers, but unlike those sellers, it doesn't have to pay a 45-51% rake - and it can make its competitor-customers cover the full cost of its own shipping!
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