(a)General. (1) The offer of "Free" merchandise or service is a promotional device frequently used to attract customers. Providing such merchandise or service with the purchase of some other article or service has often been found to be a useful and valuable marketing tool. (2) Because the purchasing public continually searches for the best buy, and regards the offer of "Free" merchandise or service to be a special bargain, all such offers must be made with extreme care so as to avoid any possibility