In each round of the competition, every team can issue three denominations of cards, with each card having a matching "face value" and "price". Users could buy cards with USDT. The "face value" cards will be given as rewards to the user if their prediction is accurate. However, incorrect predictions will invalidate the card in this round.
The maximum total face value of cards that can be purchased for one account in a single turn is 1000 USDT.