Maybe it’s the lack of coffee in my system, but just had a thought triggered from reading about the coin machine.
How about adding a gambling machine(s) to the game?
For instance, say players could craft slot machines(the forge kinda has a similar metric to it). Essentially the owner of the machine would add coin to the machine, assign the Jackpot amount, the line payouts, and the cost of each spin. Perhaps the owner can even assign a payout percentage on the machine that is visible to other players. On the coin management side the machine the Jack pot purse would retain its amount until its paid out. The line payouts would pull from a second purse. If this purse is depleted the machine is not useable until the machine owner adds enough coin to cover the payout structure. Any profits made from the could go into a separate “profit purse” or be assigned to the payout purse. I’m sure this part would require a lot of consideration.
On the player/customer side, they would essentially walk up to the machine, see jackpot payout, the payout structure, the assigned win percentage, and the cost of each roll. They would have no idea what or if anything has been payed out or even if the machine has even been used.
Didn’t want a word wall, so won’t go far into detail. But just enough to make a suggestion.