Safeway, Kroger, and Costco's market caps are all under the 600b limit. Even Walmart is under this. What makes Amazon different is Amazon controls 38% of all o

Safeway, Kroger, and Costco's market caps are all under the 600b limit. Even Walmart is under this. What makes Amazon different is Amazon controls 38% of all online retail sales in the United States[1]. No company comes close to their dominance in the market. [1] https://www.bloomberg.com/news/articles/2019-06-13/emarketer-cuts-estimate-of-amazon-s-u-s-online-market-share https://www.bloomberg.com/news/articles/2019-06-13/emarketer...