While selling something online is relatively easy, making a profit from e-commerce has proven incredibly difficult. Name an online retailer, and odds are that company is losing money, regardless of how many billions in sales they pull in. Amazon only recently turned a profit on its retail division after twenty years of selling books and other goods online, and it was hardly a robust one. In the second quarter of 2015, Amazon’s retail operating margin in North America was 2.5 percent, compared to 25 percent on its more lucrative web services.