With oxygenated fuel in the cigarettes. Wrap a storm matchstick in it.

They don't care how long you've been smoking, I guess it has more to do with how much money you have. Maybe they figured out they can't suck you any more dry then you already are. Or they dont think you would spend enough to justify the R&D. Because i am quite sure, if people would not spend money for abovewater cigs but would for underwater cigs, they would find a way to make money from that.