You people should be aware that AMZN will be driven out of business as soon as FDX or UPS decides to do e-commerce, right?
They already have the infrastructure, and since their business is moving stuff, they could accept gross margins 1/2 of what AMZN needs and STILL come out ahead ... meaning AMZN would be instantly done. All it takes is for management back at FDX or UPS to have the idea.
So tell me, what's keeping FDX and UPS from setting up a website where they sell the 20% of products with the most volume, by just shipping them from the manufacturer to the household, or using their own distribution centers?
Vertical integration produces lower, not higher, PEs.
Anyway, AMZN expanding into the delivery service would be a strategy, yes - though you'd expect the transition to be ugly since the already existing delivery services would take away preferential treatment. The delivery services can live without AMZN, AMZN cannot live without them.
That's the reason why sales taxes are such a huge threat.
That's also the reason why if UPS or FDX decides to get in the game, AMZN is done. It is done, because AMZN has to pay FDX/UPS their margin and still get their own margin, whereas FDX/UPS could be happy with their own margin plus 1/2 AMZN's ...