When you create a service, you have to choose the payment method for your fans : InApp Purchase or Credit card(Stripe)?
In-app makes the purchase easy and impulsive which drives sales are easier and faster for the customer, but the fees taken from the stores (Apple Store, Google Play, …) is high (30%). If you chose this method you will get 60% of your listed price.
Credit card: The process takes a bit longer for your customer as she/he has to enter his contact details. The requirement of a credit card may limit some customers. But because the fees are lower, you will get 85% of your listed price.
Based on studies of In-app purchases, we suggest using In-app for low-priced services (<$15) and Credit card for more expensive ones (>$15).