Roulette

Users collect common pool. In roulette, users receive directly proportional odds. Example: 3 users filled common pool with 100 USDT ($1,000 X). User №1 contributed $500 X to the pool, user №2 contributed $350 X, and user №3 contributed $150 X. Users have 50%, 35%, and 15% chance of winning, respectively. Winner receives entire allocation of their opponents.