Hotpot Restaurant Membership Card

People who get this card will have bottomless stomachs (they won't feel pain when eating but will still have taste) and will actively choose a hot pot restaurant. For some unknown reason, the restaurant owners will treat the group who got the card to a free feast (the restaurant owners won't notice anything unusual). This card will be passed on to the next person by the cardholder until the restaurant goes bankrupt from being eaten out. If the card is destroyed or its rules are erased, it will reappear on a random lucky passerby after a period of time.