My honest question is: If you pull shenanigans like this, isn't it actually making Amazon burn through said imaginary money, thus hastening its demise? The cost of delivering a potato has to be on the order of at least a couple dollars.
Amazon will close your account before you can impact their bottom line.
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?