A payment card has a natural life cycle.
A card starts in an inactive state.
The card will remain in an inactive state so long as there have been zero transactions processed against the card (including authorizations).
As soon as the first successful transaction has been processed against the card, it will move to an active state.
Once the expiration date is reached, a card may be marked as expired by the system.
Also, the card can be deactivated. Once deactivated, no further charges can be made against the card. The card cannot be re-activated.
Either an inactive card or an active card can be set as the default payment card for a subscription. If set, all subscription renewal charges for the subscriber will be made against the default card.