No restrictions on what software people can run on their devices.
It seems like most proposals from companies actually making money on the platform (as opposed to folks like you and I in the cheap seats) are to keep the experience the same for the users, with the same amount of value, only charge less.
Where's my 30%? Because the value I provided was critical to that transaction, to that experience, to the value provided. Others could have provided that value, but didn't.
I can make the same argument you make. But I'm not a trillion dollar company. That's the real difference.