Being smarter than the average IE user, an Opera user would not fall for "Your computer is giving away your IP address. Click Here" type of ads. Even if the user does find something useful, a techie would PROBABLY research some more before making a purchase.
That is, it is slightly difficult to get an Opera user to open his/her wallet.
Interesting. Do you think Opera is more widely used in Scandinavian countries than in the rest of Europe?