Costco seems to have a magnetic pull for shoppers and business experts around the world. When the first Costco launched in China last year, managers had to close its grand opening early to stem the chaos caused by massive crowds and nearby traffic jams. For those who study retail, analysis of the company's strategy has become something of a cottage industry. The enigmatic warehouse store doesn't follow many of the traditional rules. Here are some lesser-known facts about this fascinating wholesale club operator.