Our token system is a mechanism that guarantees boat availability.
Each token allows you to reserve a trip. On the day, as soon as you start the boat, you get your token back to reserve again. Once you've laid down all your tokens, you can no longer make a reservation. Each subscriber has two tokens (half-day reservations), renewable ad infinitum.
With 2 tokens, the subscriber can reserve a whole day, or two separate half-days.