Disclaimer

[Burter]

We, the staff of CDBZ and the hosts of CDBZ: The Apprentice reserve the right to steal anything we want that you, the players, create while playing our game.

In other words, we're going to take your stuff and there is nothing you can do about it.

[Reijin]

I remember Wizards of the Coast stating when they held a contest for artists to have a chance to get their art onto a card that they reserve the right to claim ownership over all entries. It's standard procedure.