I think Board of Director have power to suspend any director in case of possible wrong doing. No logic if biggest shareholder can do anything good or bad to the listed company ma. Correct me if im wrong.
Payments on Apple Pay are processed through a compatible credit card payment gateway. It use same method when we hold a credit card to tap credit card machine for payment, instead, user now use iphone to tap on credit card machine. So in theory, i assume if the machine supported by Revenue, all the transaction will verified and go through the company first.