I have no data, only the observation that whenever this kind of discussion takes place, there are always people who claim to be unaffected by advertising. I don't think that people are a good judge of their own biases, and that we tend to over-rate ourselves.

If lots of people are susceptible, I have to live in the world with the economy that this situation creates whether or not I'm personally as susceptible as someone else.

Yes, of course. But I think there's a difference between (say) "I play WoW (as opposed to some other MMO) to play with my friends who play WoW because of advertising" and "I play WoW because of advertising".

And I think logingone or joosters were talking about the second, not the first.