It’s a common knowledge that you need to stake a certain tokens to receive dividend which in Betfury, BFG tokens acts as your shares in the casino and you will need to stake it on there staking page
https://betfury.io/staking to earn dividend in different currency offered by the casino or use your BFG tokens to farm in fixed APY to earn more BFG tokens in there farming page
https://farming.betfury.io/. You can explore the website for yourself to understand the casino functionality.