They adjust their strategies to local conditions. In EU they can do little. Elsewhere, they actually sue countries[0] to keep their rights to advertise death.
I work with a fair number of expensively-educated persons in their 20s. A surprising number of them smoke.
Also, smoking companies spent a very long time making sure that the now widely-known health effects weren't so widely known. Lies and confusion. Some of it still happens, especially in '3rd world' countries.