I have a PP membership with two free visits, via a Bank of Melbourne card. That card account was closed some time ago. Is it necessary for the card still to be active for the free visits to work? (I'm not sure, for instance, whether a charge is sent through to the "gifting" bank and is then zeroed at their end for a "free" visit, or if PP actually has the visit credits in their system somewhere -- certainly not visible to me in the app.)