1) Amazon's business model can be summarized in two sentences: "Amazon is a typical fixed cost business model that uses the Internet to maximize its fixed costs. Once it gets enough sales and the profits from these sales exceed its fixed costs, it starts to make money. In the past, Amazon has crossed this hurdle."

2) Most of Amazon's retail businesses are profitable, and only a few retail businesses are losing money.

3) Amazon, as a platform, is very profitable. Many people and companies sell things on Amazon. As a platform, Amazon's costs are very low.

4) Amazon is currently losing money because it is investing crazily to distance itself from its competitors. Amazon has discovered that cheap and fast delivery can drive sales growth. Therefore, it is investing to make this possibility a reality.

5) If Amazon stops investing, it will immediately become profitable. Eugene Wei said that Amazon has the opportunity to make profits from all transactions. It has a quarterly loss because of its large-scale investment. Many people believe that when Amazon establishes an oligopoly in the e-commerce field and starts to raise prices, Amazon will finally become profitable. This view is wrong because Amazon only needs to stop investing to become profitable.