pinedapple

What is Apple's Cut going to be to use Apple Pay ?

1. Say, I have an app that will Apple Pay. So in addition to 30% cut made by Apple for my app will using Apple Pay cost more ?

2. I understand this will require NFC terminal to recognize the payment through Apple Pay but that's in physical store. If I already have some payment method setup for my app why should I choose to use Apple Pay ? or I guess my question is Apple already stores credit cards. While purchasing apps you can already do with one click. How Apple Pay is different ?