Mystery of the Raleigh Filter Tip Cigarette Butts

One of the most specific clues in the Cooper case were eight filter tipped cigarrette butts found in the ashtray of row 18 on the hijacked plane. At the time, Raleigh was a coupon cigarette, meaning that if you smoked enough of them, you qualified for free packs and merchandise. The FBI went so far as to inquire into the 6 million Raleigh coupon smokers. Was Dan Cooper among them? Or, as some suspected, did Dan Cooper smoke as a way to throw off the authorities?