A new service called Wanderift has launched a new approach to booking air travel. Travelers can join the program for a one-time fee of $500, and then pay $100 to $125 each for up to 50 airfare “tokens” per year. One token can be used for a one-way itinerary anywhere in the lower 48 states and some Caribbean points, but bookings can only be made eight days in advance or fewer.