https://tontine.cash/ is a MSCHF game. On 2021-12-27, 7141 players each paid $10 into a central pot and have been required to check in at least once a day by midnight EST/EDT or else be eliminated. The last remaining player will win the pot. As of 2023-12-31, 312 players remain, of whom 36 are in Polybius's Tontine Discord server.
The market resolves to the number of living players who began the year in Polybius's Tontine Discord server who are still alive in Tontine at the start of Year 3, 2024-12-29 - there were 36 of these. Anyone may add guesses, but the market will not resolve to any choice that does not specify a single integer and will resolve to the correct guess that was added first - any duplicates, ranges, or noninteger or nonnumeric values will always resolve NO.