One time payment mode

Since this is a Pay as You can model, I would like to pay whenever I feel like I have used the service. But the options are only monthly. Why can I not make a one time payment?

Hello,

You can make a one time contribution to FreeConferenceCall. You can send a check to CarrierX LLC. PO Box 41069, LB, CA, 90853-1069. Thank you