This is similar to a strategy to prevent email spam. Sender pays the Receiver 5 cents for each email they send, unless the Receiver has the sender in their addr

This is similar to a strategy to prevent email spam. Sender pays the Receiver 5 cents for each email they send, unless the Receiver has the sender in their address book. The Receiver can also after reading a message from a new email, choose to waive the 5 cents.