Apple Pay - Not available for in-app payments
When I try to use Apple Pay in the Apple Store app to pay for a mbp 13" that is around 15K HKD, some of my credit cards are selectable, some of the cards are under the section "NOT AVAILABLE FOR IN-APP PAYMENTS".
Why is that?
The selectable cards are Visa and owned by me. The not available cards are MasterCard that are not owned by me. Are they related?
Do I need to do any setup to allow this?
I would like to pay by the MasterCard bcoz its DBS Black...
iPhone 6s, iOS 10.1.1