No amusement device or game table shall be used for the purpose of awarding any money or object of value other than free games or extended play, to the player or players, and shall not contain any mechanism which varies the chance of winning free games or the number of free games which may be won, depending on the number of coins inserted into the device; PROVIDED That in no event shall a machine be so designed and equipped as to render it of practical utility only as a device to be used for gambling. (Added by Ord. 83-156 § 2, Dec. 29, 1983, Eff date Jan. 1, 1984; Amended by Amended Ord. 97-043 § 4, June 11, 1997, Eff date June 23, 1997).