The problem is it's clearly a monopoly (or duopoly). How did they settle on 30%? Why did Apple and Google come to the same 30% number - is that a coincidence? T

The problem is it's clearly a monopoly (or duopoly). How did they settle on 30%? Why did Apple and Google come to the same 30% number - is that a coincidence? They could easily provide the same service for less than 1/3 of the cost, but the percent never budges because it doesn't have to. There's zero competitive pressure. In fact they could move it up to 60% if they want to with nothing stopping them. Some people have managed to build a business on these app stores but in my opinion they should only be leveraged as part of an existing independent business, otherwise you're building a business on quicksand.