There are less people earlier in the cruise, and it gets more packed as the days roll on and the snowball jackpot rolls. It almost always isn't won until the last game. When we played, there were money prizes for the bingo games and then a raffle for other stuff. I won three times, but the amounts were small and I won with other people, so it just barely covered the cost of our cards. It was still lots of fun though!
Barb