When it comes to Bingo Blitz, there are a few ways that you can get free credits. The first way is to simply sign up for a free account. This will give you a certain amount of credits that you can use to play the game. The second way is to participate in the daily and weekly bonus tournaments.
These tournaments offer a large amount of free credits if you are able to win them. The final way to get free credits is by referring your friends to the game. When they join and make a deposit, you will also receive a bonus of free credits.