Fortune Coins are a type of Sweep Coins that can be used to play games and can be gotten only through bonuses and rewards. They hold real value, and you can redeem them for real cash prizes once you reach 5,000 Fortune Coins.
My Fortune Coins review highlighted a typical time of around three to five days for players redeeming cash prizes via the sweepstakes portion of the site. There are no withdrawals available as there would be at other casinos. You can't redeem any Gold Coins for cash prizes, only Fortune Coins you've played with.