As the single largest player in the ecommerce industry, Amazon generates between 10% and 15% of global online sales. In its home market, the US ecommerce giant makes up to 40% of total ecommerce sales and generates the highest revenue in three out of four major product categories, outperforming competitors by a large margin. But ironically, while Amazon is seen as emblematic of American success in ecommerce, Chinese products are the backbone of its marketplace.According to data presented by AltIndex.com, more than 70% of all products sold on Amazon are made in China.