AWS’s revenues and profits were a closely guarded secret. The division generated $4.6 billion in sales in 2014 and was growing at a 50 percent annual clip. But Amazon disguised those numbers, along with nascent advertising revenues, in a sundry “other” category on its income statement, so that potential competitors like Microsoft and Google would not recognize how attractive a business cloud computing actually was. Observers and analysts could only guess at the financial dimensions of a unique enterprise computing business, anomalously tucked inside an online retailer.
