Accepting or rejecting a civilian to become a securicar passenger.

When a civilian enters in a securicar driver's vehicle as a passenger, there should be some sort of a box that asks the driver whether they want the civilian to become a securicar guy as a passenger (/Y or /N or Pressing Y or N).

but... why?

maybe the driver doesn't want to share his cut, or the driver gets the same money? correct me if I'm wrong.

Same ._.