Strengthening Arguments for Coffee Shop Loyalty Program

A local coffee shop has reported an increase in customer visits following the introduction of a new loyalty program. The owner believes that this program is the primary reason for the increase in business, as customers are now incentivized to visit more frequently.

However, a competitor has recently opened nearby, offering similar products at lower prices. This development raises the question of whether customers are visiting the coffee shop due to the loyalty program or if they are simply avoiding the competitor.

To strengthen the owner’s argument that the loyalty program is responsible for the increase in customer visits, which of the following statements would be most helpful to know?