How much does the card cost?   For others, the card costs $20. However, you will get 20 Jumbo Dollars (J$20) credited into your card as a welcome gift. Therefore, the card is virtually free! What is the validity of the card?     How much J$ can I redeem per visit?     What happens to my J$ when my card expires?     Can I use multiple Jumbo Rewards Cards to redeem/earn J$?     How do I check my J$ balance?     What if I lost my card? Will I lose my J$ also?     How do I sign up?