Hello, seeking advice on IAP and Apple Pay for my app. We have two user types: fans and athletes. Fans can ask text or video questions, or directly tip athletes (referred to as "tips"). Previously used Stripe for payments, but Apple rejected it, advising IAP for digital content transactions. Considering the limitations of predefined IAP products, I'm wondering if Apple Pay could be used for dynamic tipping amounts. Thoughts on the best approach for tipping while asking questions and offering tips? Also, looking to implement a bidding feature with dynamic amounts (a gap in IAP). Appreciate insights on the most effective solution. note: here tips are donations please share your thoughts, thank you