“That fall, Amazon announced a new initiative called Marketplace. The effort started with used books. Other sellers of books were invited to advertise their wares directly within a box on Amazon’s own book pages. Customers got to choose whether to purchase the item from Amazon itself or from a third-party seller. If they chose the latter, either because the seller had a lower price or because the product was out of stock at Amazon, the company would lose the sale but collect a small commission. “Jeff was super clear from the beginning,” says Neil Roseman. “If somebody else can sell it cheaper than us, we should let them and figure out how they are able to do it.”