Aha, got it. Basically you can not withdraw the prize money at least right away, they can go towards opening a live account. One can withdraw the money only if he meets apparently 13 criteria, according to Dukascopy rep I spoke on the phone. I guess one of which is:
The winners may withdraw cash prize amounts from their respective live accounts after meeting the following minimum turnover requirements on these live accounts:
1st place - 10 million USD
2nd-3rd places - 5 million USD
4th-6th places - 2 million USD
7th-10th places - 1 million USD
The link of those interested is:
https://www.dukascopy.com/tradercontest/ ... les#prizes