Voodoo does not work in gambling games, if it truly works I don't think that there will be any gambling company out there anymore because, everyone will just be winning and there will be no loss, which will result to fold up of gambling company, those that used voodoo and said that their games were won are just mere coincidence.
^ The line that I bolded above was definitely right, that's all about coincidence and nothing happens on superstitious belief. But the fact that we can not blame those gamblers of what they believe is. Voodoo is something give them the strength to have good luck while having gambling. But the truth they are not making any sense at all. Nevertheless, nothing's lost with you if you are a superstitious believer.