When you join Costco (NASDAQ: COST), the warehouse club already has what it wants. Since the chain makes about three quarters of its revenue from membership fees its management does not really care if you use the card you paid $60 or $120 for. That means it's entirely up to you to get the most out of your membership and there are a number of ways you can do that.
Invest better with The Motley Fool. Get stock recommendations, portfolio guidance, and more from The Motley Fool's premium services.