Runathon Inc. opened a store that displayed shoe brands only. The employees were polite and professional. Runathon also had experts who advised customers on the type of shoe best suited for a particular sport. A few years later, another company called FitRight Corp. opened next to Runathon. Although FitRight stocked shoe brands, sportswear, and other gear, it was not as profitable as Runathon because its salespeople were not as experienced and knowledgeable. Which of the following barriers to imitation protected Runathon$$s store from being imitated?