Amazon cut ties with Fed Ex ground and are doing most of their own deliveries. This has really hurt all of the LTL ground carriers.
They can afford to. Amazon is the number one retail store in the world.
USPS took all of FedExs business. My mail carrier was delivering Amazon on Sunday the weeks prior to Christmas. Im sure were subsidizing Bezos with our taxes to the tune of hundreds of millions. But damn, Amazon is convenient.
FedEx is now shipping all of Targets online orders. In my area most small Amazon deliveries are USPS and larger one UPS. Not too many come by Amazons own fleet yet.
Their orders usually arrive within 24 hours. And you get live tracking and can watch the delivery person drive up your driveway.
In my area...LA, the also offer free same day shipping.