Costco's website isn't bad by accident. It's bad by design priority. The company runs on 11-14% gross margins in an industry where competitors sit at 25-30%, which means every dollar spent on web development competes directly with keeping prices low. Their entire business model revolves around getting you into warehouses where impulse purchases and treasure hunt dynamics drive basket sizes 40-60% higher than planned purchases. The specific problems are obvious to anyone who's used it. Search returns irrelevant results because their product taxonomy is minimal. Navigation buries categories three clicks deep. Product pages lack basic filtering. Images are low-resolution. The checkout flow feels like 2008. Mobile responsiveness exists but barely. None of this is incompetence. Costco's web team knows exactly what modern e-commerce looks like. They've chosen not to build it. Three reasons explain this: - Membership revenue (~$4.2 billion annually) depends on warehouse visits, not web orders - Online fulfillment costs eat into already thin margins, especially for bulkier items - Limited SKU rotation (3,700 items vs Amazon's millions) means search sophistication matters less The calculated risk is that members tolerate a mediocre website because the value proposition (bulk pricing, Kirkland quality, generous returns) outweighs the friction. And so far, they're right. Costco's e-commerce grows 15-20% annually despite the interface, because the brand trust and price advantage carry it. When we audit e-commerce sites at Ottawa SEO, Costco is actually a useful case study in what you can get away with when your offline moat is deep enough. But for 99% of businesses without a membership model and warehouse network, copying Costco's web neglect would be suicide. If your revenue depends on digital conversions, you need fast load times, intuitive navigation, and mobile-first design. Costco can ignore these rules. You can't.