Key Takeaways Costco benefits from high member renewal rates, global scale and a resilient fee-based model.COST posted 8.6% sales growth in October and 16.6% growth in digitally-enabled comparable sales.BJ's club comps rose 1.8% ex-gas, with digital members driving stronger engagement and larger baskets.Costco Wholesale Corporation (COST) and BJ's Wholesale Club Holdings, Inc. (BJ) operate in the warehouse retail space. Costco, which boasts a market capitalization of about $396.6 billion, runs a membership- ...