RogerSpees If you have the Premium membership, you can request 3 passes where you have the choice between Maestro, Mastercard (debit) and Mastercard (credit), also known as Travel Card. You can also downgrade to the (free) Travel Card membership. With this membership you only get the Travel Card, and no bills, iDeal, and the like. You can change your membership under Profile => My membership.
So you have the Travel Card membership, and the Travel Card itself. These are two different things.
Please note, if you now have the "Free" membership, and adjust this to Travel Card, you can no longer go back to Free, because this membership no longer exists.