The operator of an illegal gambling enterprise, activity or operation shall be guilty of a Class 6 felony. However, any such operator who engages in an illegal gambling operation which (i) has been or remains in substantially continuous operation for a period in excess of thirty days or (ii) has gross revenue of $2,000 or more in any single day shall be fined not more than $20,000 and imprisoned not less than one year nor more than ten years. As used in this section, the term “gross revenue” means the total amount of illegal gambling transactions handled, dealt with, received by or placed with such operation, as distinguished from any net figure or amount from which deductions are taken, without regard to whether money or any other thing of value actually changes hands.