I like things that drain zeny from the economy, however if the reward back is zeny it's not draining. It's a delicate thing to balance if we give items. If the rewards are too good then it serves only that the richest players will get them and get richer, if it's not good at all then nobody will buy tickets!
I don't hate the idea, but for now I think we can do without it, and if I were to add the already made script you can be sure I'd remove the GM rig