Amazon is vertically integrating their business. Today it's a few used airplanes. Tomorrow they buy CVG and turn it into a cargo hub that rivals SDF and MEM. They already have fleets of delivery vehicles in most major metro markets. Amazon is on pace to deliver 6.5 Billion packages next year. For reference, UPS delivers 5.5 Billion packages per year.
Amazon grew from an online book retailer to a WalMart competitor.
Amazon Web Services used their expertise in managing gigantic networks to become one of the worlds largest cloud computing providers rivaling Google and Microsoft.
Who thinks their in house air cargo will grow to compete with FedEx and UPS?