I've got a situation to propose.
Setting: Amusement Park
You and your family show up to the front gate of the Park to purchase your entry tickets. They ask for basic information before they swipe your card and tell you that all of your information is accessible and intended for you to use on their park app as you enjoy your day with them.
As you go throughout the park, you can make transactions using only your app (or maybe some other casual interaction like a QR hand stamp, personal ID token, or something) because your card information was accessed from the start.
The benefit would be ease of access for the rest of your experience because your beginning interaction with the company was expected to start with a purchase.
(Sorry if this scenario is confusingly written - I may come back and edit it for clarity when I more time than as my teacher is starting his lecture today)