The practice and the believe of voodoo to work or make ones to win in gambling is just an act of lazy gamblers which believe gambling is a quick to rich scheme where in the end gamblers winning level are determine by strategy and luck.
^ That's is totally right, but we could not blame those believers on voodoo. Each one of us has a different technique or something makes us hoping to win in every gamble. Nevertheless, there's nothing that will be lost at you if you believe on this. Yes, it sounds like lazy gamblers but probably they will get the strength of what they had believed. In the end, it will be based on luck and strategies.