When buying a train ticket , you get in line for a reward .
Reward will be replenished with the purchase of new tickets by other people.
As soon as the amount of reward is covered by the amount of purchased tickets, it is paid to the first in the queue of those who have not yet received a reward
The payout counter shows how many people have already received a reward from the beginning of the queue. If the next person waiting ends his waiting limit , the train leaves and one in five receives a free train ticket of the same value.
Buying a ticket, you become in line for the last bought.