I think commissions are the smallest part of the problem. The problem is that you are buying what seems like a general computing platform, but then you will be

I think commissions are the smallest part of the problem. The problem is that you are buying what seems like a general computing platform, but then you will be prevented from using apps that Apple doesn't find helpful to their business. Not allowing another in-app payment solution is just one of the many things that they are preventing.