Amazon is known for its fast delivery times and reliability. I know when I place an order from the site, if it doesn't get here in the promised two days, that's because it got here in one instead. This has brought the online retailer widespread adoption, even if that hasn't necessary translated into huge profits.

This has only encouraged Amazon to speed things up. We've heard talk of drones for a few years now. A more recent rumor has been that Amazon was planning on using everyday Americans to help with same-day delivery. You could call this the Uber approach.

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