Amazon sold 50 million Alexa-capable devices since its launch till August hoping that the users would use the devices to shop online but the company’s hopes were shattered when the executives learnt that there were few takers of this concept. The news website says that two persons briefed on the company’s internal figures. “Of the people who did buy something using Alexa voice shopping, about 90 percent didn’t try it again,” one of the persons was quoted as saying.