how and what are bonus funds used for and why does it show a balance but cant access it. what is it used for
Your Cafe Casino account balance is made up of the Withdrawable, Locked, and Bonus balances, and you can always see it at the top of any page! With having an active bonus, keeping track of how the funds are removed from your account is pretty straightforward.
Certain bonuses can only be used on some Casino games and this is usually specified in the ‘Bonus Description’ along with the rollover/playthrough requirement.
HERE is a full help center article for more info about bonuses.