BlogNomic: The First Dynasty of Desertfrog

Create a Dynastic rule, called “Customers”:

A Driver’s cab may either be With or Without Customer. Each Driver has an amount of Current Fare, initially 0. When a Driver With Customer drives a CASH Route, or any other Route that increases his Cash amount by X, his Current Fare also increases by X.
If this rule does not have a subrule titled “Pick-up”, this rule and all of its subrules do nothing.

Create a new subrule to “Customers”, called “Drop-off”:

At any time, A Driver With Customer can Drop His Customer. He then becomes a Driver Without Customer, and if his Current Fare is X, his Cash increases by X and his Current Fare drops to 0.