A closed-loop play currency
Settle bets, chores, and IOUs in Crub Bucks.
Crub Bucks have no real-world value. The system sums to zero by construction — for every buck someone's up, someone else is down. Wallets are allowed to go negative; the bank is bottomless.
Zero-sum by design
Every transfer debits one wallet and credits another by the same amount. The ledger
can't drift out of balance.
Negative is normal
Lose a wager and dip below zero. No overdraft, no shame — just a number to win back.
Friends, not groups
Add friends by email. A bet is the only grouping — make one, add friends, set per-person
payouts and losses, resolve whenever.