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.
For online gambling can this still be practiced? because in my opinion even though that belief still exists up to now many people should have become rich due to that. but the fact is that no one is successful because of that. this is just a trick
We don't know because, in online gambling, we don't know if other gamblers are using the spell. But if that is for traditional gambling, it could be true because some traditional gambling games still have fans, and I think in Asian, many people are playing the games. But once again, we don't know if they use some magic spell to win or not because if we ask every gambler in a traditional gambling game, they won't admit because that will be their secret.