Explanation on how card rentals currently work.
Rental contracts are only for 24 hours so if one selects renew for 7 days all that does is allow you the same card IF the card owner agrees to additional 24 hour rental contracts. Both sides need to agree to an additional 24 hours after the initial 24 hours is up. If the card owner cancels that means they didn't agree and no contract was created. Be nice to have 3 day and 7 day contracts as well but we don't have that yet but I bet eventually we will.