I haven't used cloudbet but it is normal for any gambling site or any exchange to have a fee to send funds to another address. It's just a standard practice that is due to the fact that it requires work for the miners to move the funds and they are supposed to get paid a little for moving the Bitcoins.

The thing that does vary I think is the amount of the fee. I think some sites and exchanges may charge a smaller fee than others. If you are moving a small amount and the fee is fixed, then it could be a lot of money relative the what you are moving.