There's no material reward for this service, just a service card on which hours of service are credited. If the volunteers need service themselves some time in the future, they can then use the card to "make a withdrawal" and get service from someone else.
服務沒有酬勞，只有一張義工卡，上頭登錄了服務時數，將來一旦有需要時可以「提領」，接受他人的服務。