I guess it also depends on which target audience you are trying to reach.
The posters are usefull if you are trying to get youngs, students and so on....
But the other side of the medal is: they can also bring a cheap image of your company.

Actually i find the idea of FunkyFrog simply excellent.
Peoples like games, people like to win something, egal what....

Please, FF, tell us who is story is going.... you'll be more than welcome to write an article to relate this here.... :)

Keep on the good work.