Update: I can’t get anything past our readers:
Actually, the best snipers don’t smoke–not because its bad for the
lungs (that too, though) but because it can shorten a sniper’s life
expectancy in other ways. First, a sniper has to remain hidden for
many hours at a time, and the urge to light up does not lend itself
to that. The opportunity to light a cigarette without giving away
one’s position is hard to find, while the smoke of a cigarette
wafting up from a bush is a (literally) dead giveaway. Finally,
tobacco has a distinctive smell, and American cigarettes generally
smell different from those made in Europe, Asia or the Middle East.
Since the smell adheres to clothing, a smoker can be detected at a
distance by that means alone, even when otherwise concealed.
As pointed out in the commentary following the ad, he isn’t a sniper, but a competitive marksman. His weapon and peripheral equipment support this.