I need help with this case Study... I have reviewed expert answers about this exact case but found their answers were conflicting. Looking for some clarification. Thanks

Runway Discount (Runway or the Company) is a privately held online retailer that sells discounted high-end fashions. In an effort to increase its sales and customer base, Runway implemented a customer referral marketing campaign (the Refer-a-Friend Program) whereby existing customers can refer friends to Runway and receive a $25 credit toward the purchase of future merchandise. The terms of the program are as follows: Runway offers existing customers (the Existing Customer) a $25 credit (the $25 Referral Credit) if the Existing Customer refers a friend (the New Customer) to Runways Web site and the New Customer purchases merchandise from Runway. After a purchase is made by the New Customer, the Existing Customer receives a $25 credit to be applied to a future purchase from Runway. The $25 Referral Credit represents the fair value of the cost Runway would pay to acquire a new customer from an unrelated third party or marketing firm who is not a purchaser of its products. The program is open to all of Runways customers and does not need to be combined with any initial or existing purchases. Required: 1. How should the $25 Referral Credit be recorded in Runways income statement? 2. When would Runway record the $25 Referral Credit? What are the journal entries Runway would record when the $25 Referral Credit is earned by the Existing Customer? What are the journal entries Runway would record when the $25 Referral Credit is redeemed against a $100 purchase made by the Existing Customer? 3. Runway is planning to adopt IFRSs in the near future. What is the relevant accounting guidance it would follow under IFRSs?