~snip~
This is indeed a strange issue. At the same time, it is good that they have informed you about this earlier. Other casinos don't show this type of warning message if the system flagged the registered IP address of the users
for any reason. Users face problems there when they try to make withdrawal after taking any bonuses. Apart from deposit bonus, you might face problems to claim the No-Deposit Bonus, Lucky Spin and some other promotions on time to time. Another user of BCgame had faced a similar issue like you:
BC.GAME fake bonus promotion