In the world of sales and marketing, it is a proven fact that is is easier to sell more to an existing customer than it is to acquire a new one. When I was a sales leader at Best Buy, we focused on organic growth. That is, taking the existing customer base and simply increase the average sale by $10. Which would result in millions of additional revenue company wide. In theory if a customer is already happy, then they will also explore other products and services.
*