With the respect of gambling, it must be one of the best suitable sector for using bitcoin payment system. Bitcoin gambling is exploding because, without any country's restrictions and with very low transaction fees and also makes it possible to gamble with the very less amount.
What if there isn't any transaction fee involve then I think that will surely make bitcoin gambling become more popular right? because many will possibly want to play gambling without the worry of the transaction fee at hand right that means you can have lot of money for gaming and that can be fun!
Some casinos which offers instant deposit feature can be susceptible to this exploit.