There are third party solutions to fraud that actually work, providing chargeback insurance. Essentially, they screen transactions; if any approved transactions are chargebacked, they refund you. A good start point is https://signifyd.com We dropped in this solution on our e-commerce about 5 years ago; fraud has been a non existent problem. - Source: Hacker News / over 1 year ago

See "Managing prices" under https://developer.apple.com/app-store/subscriptions. Source: about 1 year ago

From the 2nd year onwards Apple charges 15% for subscriptions, not 30%. Source: over 1 year ago

Apple and Google have great documentation if you need more information. - Source: dev.to / over 2 years ago

> I feel like these marketplaces could maybe justify 30% on the purchase of an app up front, where there are clear benefits to the exposure and platform offered by them. But ongoing revenue is really attributable to the app itself and feels to me much harder to justify. It’s not 30% of ongoing revenue though. You only have to pay 30% in one situation: you are already earning millions of dollars in the App... - Source: Hacker News / over 2 years ago