ToplineOnline shoppers came out in full force to power 11% growth in Amazon online store sales, its largest reporting segment, and its second-largest, third-party seller services, advanced 11% in the second quarter ended June 30, all before the big Amazon Prime Day four-day sales event. Amazon Prime delivery person in van sorting packages, Queens, New York. (Photo by: Lindsey Nicholson/UCG/Universal Images Group via Getty Images)UCG/Universal Images Group via Getty ImagesKey FactsAmazon total net revenues b ...