What occurs if the bonus balance reaches zero before wagering completes?
When the bonus funds hit zero ahead of you finish wagering, the promotion ends right there with zero obligation or penalty. You can deposit your own money and play normally, but the free spin offer will not reset or reissue to the same account. Across my twenty tests, seven sessions ended this way, usually after a long stretch of dead spins and no bonus feature. There’s no risk of a negative balance, and the casino won’t pursue any lost bonus funds.