This is a short guide on how to best approach playing at the casino if your objective is to clear (or "whore") the bonus offer. The objective is not "to win" per se, but to minimize the amount you lose and thus end up with a nice profit due to the free cash offered by the casino when you sign up.
First up, there are no "betting systems" that have ever been proven to work. Clearing a bonus is all about turning the mathematical odds in your favour by playing a low risk, low variance game such as blackjack using small wagers. On average you will lose less money than the amount of the bonus, allowing you to pocket whatever is left over.