While the first 20 years of Amazon were about goods and logistics, the next ten years will be about data and content as the aging business paves its way to profitability. From its humble beginnings as the original online bookstore to its transformation into a tech giant, Amazon’s milestone comes at a time of wary optimism for the future. Yesterday's Prime Day belies a retailer keen to mitigate some of the volatility it has endured in the past with a focus on boosting membership to the premium service instead of boosting sales.