An advertisement provider issues coupons to an audiences of television set in exchange of viewing a commercial message and receives advertising rate from the advertiser of the commercial message in exchange of informing of the coupon issuance. A distal end of the component comprises an insert formed of a hard material, which covers a portion of the distal end, and acts a thread cutting tool. An intarsia pattern is knitted at a front needle bed FB, and a knitting yarn between the intarsia carrier halted near a boundary and a knitting needle F is used to perform kick-back of the intarsia carrier by the third-course movement of the carriage.