Costco quietly reshapes the way members shop

For decades, Costco offered members a simple proposition. Pay an annual membership fee and get access to the chain's warehouses, where it sells a narrow selection of high-volume items at very good prices. Until 1998, Costco did not even sell items directly through its website. You had to visit its stores if you wanted to buy anything. Even when it did add some online sales, they were limited for many years, and not a focus of the brand. Now, Costco has quietly come into the modern age with CEO Ron Vachr ...