It all started with #401. Costco’s corporate history dates to 1976, when its. Verkkoa new ranking shows costco has the most loyal customers of any retailer. Here's how they increase customer loyalty, even in difficult times. Verkkolearn how costco became one of the largest and most respected retailers in the world, with a history of low prices, high wages and loyal customers. Verkkoin this collection, we delve into the strategic brilliance that propelled costco to unprecedented success and explore the five key principles that fueled their ascent:.