A subscription fee closer to 10% starts to look attractive at least for smaller ventures. By dealing with taxes, exchange rates and credit cards, that is a fai

A subscription fee closer to 10% starts to look attractive at least for smaller ventures. By dealing with taxes, exchange rates and credit cards, that is a fairly nice set of things to not even need to think about. But the developer APIs/processes for dealing with in-app purchases are brutal and virtually unchanged over the past 5 years.