I've never played bingo on a CCL ship as my first one is in 2010, but i have on HAL and I think its a blast. On the HAL ships they play 3 games per round, you buy the 20 dollar cards and get 3 cards for each of the 3 games. There is a winner on the first two games always. The third game is the snowball game and if no one wins the jackpot rolls over to the next day's game. If no one wins it is absolutly given away on the last game of the voyage. I know, I won over 600 in the pot and split it with 3 others (2400 pot).
I think CCL is not so liberal with it's payouts,,but I'll be there anyhow.