Costco's (NASDAQ:COST) unconventional business model remains highly successful despite living in the age of Internet retailers. Paid memberships remain central to Costco's business model not only for profitability, but also for driving repeat visits. In this video, Motley Fool contributor Steve Heller goes through what makes Costco a great business, and whether the threat of Amazon (NASDAQ:AMZN) Prime is more than just a threat to Costco's business. 



Fool contributor Steve Heller has no position in any stocks mentioned. The Motley Fool recommends and Costco Wholesale. The Motley Fool owns shares of and Costco Wholesale. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.