As far as Amazon's own delivery, they contract that out to other companies. A few months ago they had a news story on the local TV stations about a crooked company owner who was not paying his employees. He would hire contractors, but never pay them. So he got a reputation for losing most of his new employees in a month or so. Amazon discovered what he was doing and cancelled their contracts with his company, but no telling how many deliveries got screwed up by that crook's company. I think he was contracting out to Amazon in several large cities around the country. So contractors can be a PITA too. At least Amazon tries to react quickly and get rid of bad ones.