Maarten (turn on "EU sponsor coordinator" mode, please),
We are discussing with a tourist flight company for sponsoring what they call "Experiences" - flights in panoramic routes - and I got them interested in sponsoring EU prizes.
Note however that they focus on portuguese aerial space, so the winner should come to Portugal to fly it :-)
I think it's an interesting way of filling the prize bag - if the winner is not able to spend it, nobody looses anything.
-NT