Hey there,
I’m pretty sure to think that a casino game using in-game currency, would go against Roblox Terms Of Service, but i’m not sure. I greatly would love to know a little more about this topic. I’ve scoured the forum but can only find out that gambling entitled games are allowed as long as no robux are used to gain currency used to gamble.
Many Thanks
ooxyDev
In-game currency gambling is fine. Just don’t make the gambling unfair and especially don’t make the currency purchasable by Robux 
you could also add the odds of getting an item. example. 10% chance of getting [item name].
Its ok but keep these 3 things iin mind.
1.) no dev products or gamepasses for that currency
2.) PLEASE ADD THE CHANCES. I HAVE SEEN MANY DEVELOPERS MAKE THIS MISTAKE.
3.)No offsite stuff. Like no NFT Stuff or anything tht involves real money