I don't think Amazon is losing money. It's really just that efficient.
E.g. an Amazon van rolls through my street multiple times a day. What is the marginal cost of them stopping at my house and dropping off a potato?
E.g. an Amazon van rolls through my street multiple times a day. What is the marginal cost of them stopping at my house and dropping off a potato?
At my house, it's a 140 mile round trip between the fulfillment center ("are you feeling fulfilled yet?") and the drop off location.
OTOH, there's likely more of "you" than there are of "me" ...
While Amazon is efficient, "fractions of a cent" is probably the wrong order of magnitude for even the most efficient order.