I knew, I had received a welcome bonus but didn't know about the requirements until I was about to make the withdrawal, a pop message warmed me that I was going to lose the bonus if I decided to proceed with the withdrawal. I didn't mind. I lost it but withdrew my winnings
You’re lucky that you only lose the bonus amount because some casino usually deducts all the profit made during the time when bonus is active.
So can only withdraw your bankroll in the end. New casino usually have this feature and I lose a lot that was supposed to be profit because of this BS rules on casino bonuses that is not clearly indicated on bonus ToS.
It will make sense and someworth beneficial to the gamblers if casinos could revisit their bonuses ToS to modify it in a way that even if the gambler fails to meet up or go on with the number of wagering required to claim both profits and bonus he can just withdraw the little bonus he has been able to win with the few time's he had wagered.
EG: Out of 5 wagering required and if the gambler has wagered 3 times, he should be allowed to withdraw whatever profits he made those 3 times and mustn't be that he gets to 5. These rules are so difficult that it doesn't give many gamblers a chance to earn some profits from the bonuses they receive because they eventually lose it at the last wager. Or the bonus could even expire before they could realize the numbers.