Utilizing Customer Loyalty Metrics to Build Long-Term Account Relationships. The single most predictive indicator of future growth is the degree of dependency that your existing customers have on your organization. Most corporate leaders know that it costs more to find a new customer than to grow an existing one, yet they operate by a mantra that says, “We always need more new customers!” When it fact, it is the current base of customers that will drive revenue growth. Explore how increased customer loyalty is the single most important driver of increasing overall corporate revenue and achieving greater financial performance.