The two keys to having a successful online business are generating traffic and monetizing it. Amazon has   been very successful at both. They have tens of millions of customers and they sell books and other   products to them, as well as Kindles and eBooks, as well as the products of other retailers. In this   hypothetical assignment we are considering the possibility of Amazon augmenting its monetization efforts  
by promoting by email a set of product it calls Amazons Best.