Credit to the club where due - this is a good plan. Transaction time should reduce considerably when they are not having to count out change.
Anticipating the moans of the small minority who don’t have cards (if they exist) suggest the club sell a card that can be loaded with credit at the ticket office in exchange for cash
Anticipating the moans of the small minority who don’t have cards (if they exist) suggest the club sell a card that can be loaded with credit at the ticket office in exchange for cash