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 advert

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.