Built in scarcity pricing structure

The customer is given two options: (really one. If you want this service now)

1. Join now and pay for the whole year.
2. Sit on a waitlist if you want to pay month to month.

This makes me think that the "pay yearly" tier could be waitlisted at anytime just like the monthly tier. It's a odd concept to grasp if you are unfamiliar with this type of service.