I can confirm that the bug exists, he showed it to me.
Its really dangerous for your casino because there is no limit of the $ you can make off this, the only thing is you have to do it slowly and with smart timing otherwise it will get detected. I would pay him his reward and fix this asap.
are you the same guy above ? looks like you are pushing your self to the owner about this bug so that you can get a reward .
warning them once is enough and that is already their fault if they dont want to listen to others feedback but i believe that they can fix the bugs with thier own because they can always hire programmers to the job well .