At market close, I'll randomly pick two people from the list of YES shareholders, weighted by their number of shares. (e.g. if someone has 50 shares they're twice as likely to be chosen as someone with 25 shares.)

I'll then announce who those people are and reopen the market. A day or two later, they will each PM me "split" or "steal". If they both choose "split", I'll send them each M$50. If one chooses "steal" and one chooses "split", I'll send the stealer M$100. If they both choose steal, they both get nothing.

Market resolves to YES if they both choose "split", and to NO if either chooses "steal". (And I'll publically share the results of who chose what.)

Context:

https://www.youtube.com/watch?v=TKaYRH6E36U

https://www.youtube.com/watch?v=yM38mRHY150

And the good one: https://www.youtube.com/watch?v=S0qjK3TWZE8