Hi.
Can they be a ''Deal or no deal'' game in v6? We can have chests, put signs on them for number on chest. And make books of a price you could win. and you could make a redstone, leading to a note block for a phone.
and of course, admin controlled. So they can offer the amount of money to win. Or you could find a plugin for it (if they are one then no admin need to control it)

 And of course, a fee to play, the money you pay, will be doubled as the jackpot 
so you cannot win money very easy, and make it more of a gamble game too.(like casino)
I hope you can try and make this for v6, it would be a very great game to play.
If you like/dislike my idea, post a comment below why.

Thanks for reading my idea.

Me^^