Invollet, aInvollet, a salon, gives discounts to the members of its loyalty program. The customers who possess Invollet's membership card are charged discounted rates for all its services. In this scenario, Invollet is at the _____ of relationship marketing. salon, gives discounts to the members of its loyalty program. The customers who possess Invollet's membership card are charged discounted rates for all its services. In this scenario, Invollet is at the _____ of relationship marketing.