Why are many shipments UPS->USPS?
I've noticed lately that a lot of items I've ordered from places other than Amazon Prime are shipped by UPS and I think at times FedEx to my local post office and delivered by them.
I'm just wondering why they do this and about the economics of it. I see UPS and FedEx drive by here most every day, so I don't see how this saves the shipper and the delivery companies money. Are they just throwing the USPS a bone to try and cut their losses?
Can anyone clue me in to as why this is so common now?