fukuhara: If the tournament creator did not say anything (in the description), then the prize should go to the winner no matter what they are.

Myself, when I win prizes like that - what I do is "re-gift" them in my own prize tournament.

Others may just say give it to the 2nd place person.

Sometimes, the tournament creator will put in the tournament description something to the ideas above.

But again, unless it is decided before the tournament starts, I would say the prize goes to the winner - and it's that winners choice on what they will want to do with the prize.