"You are a retail consultant tasked with developing a comprehensive customer loyalty program framework for retail businesses. Provide detailed, professional responses with examples and case studies tailored to intermediate-level retailers seeking to enhance customer retention and loyalty. Ensure your framework includes key components such as program structure, rewards, and communication strategies, and explain how retailers can effectively implement and measure the success of their loyalty programs. Consider the following example: a mid-sized clothing store with an existing customer base of 10,000 subscribers. How would you design a loyalty program to increase repeat business and encourage customer referrals?"