On the infrastructure side, Amazon has deftly shifted from minimizing infrastructure spending, as it did during its early years by using techniques such as outsourcing logistics to book distributors like Ingram, to becoming one of the world’s great infrastructure companies. Amazon is so good at infrastructure that its fastest-growing and most profitable business (AWS) is all about allowing other companies to leverage Amazon’s computing infrastructure. Amazon also makes money by offering Fulfillment by Amazon to other merchants who envy its mastery of logistics, which ought to strike fear into the hearts of frenemies like UPS and FedEx. In addition to its eighty-six gigantic fulfillment centers, Amazon also has at least fifty-eight Prime Now hubs in major markets, allowing it to beat UPS and FedEx on performance by offering same-day delivery of purchases in less than two hours. Amazon has also built out “sortation” centers that let it beat UPS and FedEx on price by shipping small packages via the United States Postal Service for about $1 rather than paying FedEx or UPS around $4.50.