Fedex mentions this is not a material amount of business. How Amazon operates it's last mile logistical network is unsustainable. These people will eventually churn out of the open air sweatshop that is delivering last mile for Amazon (Fedex's requirements are much less onerous on the ground/home delivery side, based on my conversations with both Amazon delivery drivers and Fedex ground and home delivery drivers).

Very similar to the high churn Uber and Lyft experience with drivers. It lasts only as long as you can find people desperate enough to work in these roles.

After running the numbers from Amazon's presentation on starting your own delivery company, I came away thinking its a nice JOB. In order for it to be a good profitable business that allows you a life of leisure, you end up having to manage around 400 drivers and 200 trucks, and I'm not sure if that is possible to scale that high with their model.

Do a run with an Amazon driver and see the kind of job it is. I have, and it is not a job I'd have versus a traditional retail job. Agree with your point though that you're buying a job, not a business. Lots of better businesses to buy, lots of better jobs one could have.

The difference with Amazon running that way and Fedex/UPS is that Amazon has AWS to prop up other services that run at a loss. They can run their shipping service at very low or negative profit and use AWS to make up for it.

If they can find enough now, with unemployment at multi decade lows, then it seems that you could find them anytime.

It's going to take a while for the "you're not actually making money, the profits all go eventually into the wear and tear on your vehicle" thing to filter out into general public awareness.