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I am going to review a number of interesting flaws that I have seen within the payment systems and gambling games. This includes examples that allowed me to win big while I was gambling very responsibly as well as simple methods that brought me free goods such as expensive books that I really didn't need, fake moustaches, or even caskets for my fake funeral!
Disclaimer: all issues were reported responsibly to the companies and no moustache or slot machine was harmed in this process! I am not going to name any companies during this presentation.