What is EFB? EFB is a Earn Free Bitcoin faucet with a difference...YOU decide how often to claim! Whereas most faucets only allow you to claim once per hour or once per day, we allow you to claim once 30 minutes The faucet will gradually fill up - quite quickly initially but it will slow down over time - until you make a claim. So the longer you leave it the more you will be able to claim. You may prefer to claim a smaller amount every 30 minutes, or visit once per day and claim the large amount that has built up while you were away! (* minimum 30 minutes between claims per account/IP address)