Source: my buddy runs a broker business and will not do business with Amazon under any circumstances nor will any of his peers in this market.
You could drive all over town buying groceries piecemeal at whatever store has the biggest loss leader deal on those particular items, but for a loaf of bread and a gallon of milk and a dozen eggs the savings will be offset by the expense of going to multiple stores. Yet if you are buying 10,000 gallons of milk and 10,000 loaves of bread, it becomes feasible.
It's cultural and it started way before they reached any scale. Bezos famously refused to buy desks and used recycled doors because it was cheaper. This isn't specific to Amazon, pretty much any business involved in distribution will work on ultra thin margins. If they don't penny pinch then they don't survive.
Incidentally this is most of what makes these places so miserable for their employees. They will think about their employees the same way they might consider an order for a million rolls of toilet paper.
Because mafia has done that and more
"optimizing for the short term over the long one"
A good way to optimise for short term is to become a drug dealer.
Order arrived direct from Amazon as a "gift".
I think the UI that combines the 3rd party sellers with the Walmart/Amazon corporation retailer, is deliberately made confusing. I believe over voice, like when using Alexa, it is even more unclear what vendor is being ordered from.
[1] https://www.businessinsider.com/amazon-compensation-third-pa...
Mobile Site, Mobile Apps, Alexa, etc make it very hard to see who the vendor it, I do not have this problem on the Traditional Full Size Browser Amazon.com site
IMO it was a clear case of someone doing arbitrage across ecom platforms. As a first time Walmart+ customer it certainly tarnishes my desire to ever order from there again.
Otherwise, like I have realized, you might as well just buy from eBay.
Against Amazon's rules, for sure.
Interestingly, the price was lower on Walmart.com but my wife had not checked first. But it was only $2.50 less. I have no idea how that worked out as profitable for the 'drop shipper' (in quotes because this kind of drop shipping is IMO not legitimate).
I see a lot of pundits talking about other retailers catching up. And I know that’s true to a degree. But I think they’re only catching up in some areas. Meanwhile you have Amazon building out a whole delivery fleet for their next moat.