I don't see any advantage of the gambling. All of my friends joined and played gambling, but all of them are loss. At the first when play gambling, the profit is high but then is always lose and lose. So that I think gambling is a waste of time and not an advantage, the disadvantage of this is more than the advantage. A lot of families is broken up due to this game.
Its their fault to lose more and more even when they have made profits at initial stage which shows that people greed will make them in losses.Gambling is for entertaniment so it needs to be done for their happiness not for the purpose of making money.If you have any other frieds remind them about this.