Token Sites
From TMM Wiki
What is a Token Site?
A token site gives you the ability to have surfers purchase tokens as options instead of a period of time for membership. You then have the ability to send that surfer back to the form to purchase additional tokens under that same username. NATS will keep track of the total number of tokens that a surfer has purchased. You can then post to NATS to deduct the tokens from a member when they are used in your system.