Originally Posted by Skeptic Ginger
USA does have by far the biggest market, but it's not true to say it hasn't taken off elsewhere. The overall market for the rest of the world is larger.
Tobacco companies are relatively new to the market - they were fighting against it before. The market is still largely dominated by many smaller, independent companies - it's expected that what we'll see from the tobacco companies is support for regulation/legislation that favours the big companies and makes it hard for the smaller ones to compete.
On the other hand, there are pharmaceutical companies with big profits in cessation products who are fighting back with their own research papers - so one has to be careful of biases from all sides in some of the literature out there.