I worked for FedEx Ground HQ and that is basically how it works. Often UPS and FedEx trade high volume customers back and forth because they basically make no p

I worked for FedEx Ground HQ and that is basically how it works. Often UPS and FedEx trade high volume customers back and forth because they basically make no profit on them but it keeps the network full of packages. I think UPS, FedEx, and USPS handle my Amazon deliveries. In my opinion it would be more likely for amazon to follow the SmartPost business, if they don't already do this. They would move packages between their hubs and rely on a 3rd party to do the delivery to the house. In the Smartpost network, FedEx would move the package to the closest hub and then hand it off to the USPS for home delivery. Also, FedEx is tiny compared to UPS. I'd guess about 1/3 the size.