Tiger2foreu um not sure if this is correct / but from reading what you have.
Do you by chance mean the SUBWAY Rewards Card and not the SUBWAY Gift Card.
The Gift Card is a dollar for dollar exchange or .01 to .01 ( one cent ).
The Rewards Card is for In Store Items only.
I would make a guess and say the
"SUBWAY REWARDS CARD" no
"SUBWAY GIFT CARD" yes