My immediate thought is that smoking overall is falling and falling, so maybe advertising does more than shift brand loyalty of existing customers.
Smoking in the United States and other developed nations is declining, but it’s rising worldwide. Tobacco companies simply shifted their focus to poorer, less educated nations and they’re taking in the money.
https://en.m.wikipedia.org/wiki/List_of_countries_by_cigaret...
While smoking rates have leveled off or declined in developed nations, especially among men, in developing nations tobacco consumption continues to rise.