Hi there, I'm working on an app that would allow users to order some kind of digital service (e.g. copywriting or logo design), in a way that users would buy "tokens" inside the app that could be traded for a design services. Would Apple allow to use 3rd party payment gateway (like Stripe) vs. In-App Purchases? I know that for digital content purchases Apple requires IAPs, but in my case services are done somewhere else and app is used just to order and deliver digital goods. Thanks