There are cigarettes on the market which are a lot cheaper than usual, I've seen some for as little as £1.50 (Minsk cigarettes. These cigarettes are most definitely not pure and have other disgusting stuff added to them which makes them taste even worse, but I imagine that someone who was addicted to nicotine wouldn't mind. Has increased prices led to a reduce in smoking? probably. Has increased prices led to addicts stopping? no, if you look hard enough there are a lot of shady dealers who cell cheap cigarettes under the counter that are not on show.