Gold exploit on private server

You will need to be in a private server that has a "gambling merchant" a gambling merchant is where u use gold to buy "lottery ticket" and hope u get more then what you paid for

I've used this exploit about 5 months ago but stopped since i got retail wow.
All you have to do is say buy 10 of those "tickets/bags" then open them, if there is alot then just close it. but if there is nothing, all you have to do is right click on another bag w/o closing the bag u already opened, then after u've done al the bags sell all the ones u dont need and go buy back and u will get a fresh new bag