This is a really great idea! It sounds like your first approach is to verify that events met an agreed-upon threshold. Have you looked into Mechanism Design and getting customers to e.g. pay more for great outcomes, and a little for ok outcomes?
Thank you - yes! Would love to lean more about mechanism design. Mind diving deeper?
Setting a fixed price is a simple way to help these two parties transact. But hypothetically, it may be more efficient - e.g. you will let more mutually-beneficial events happen - to ask both parties for what their number is for a given event, and having both transact when the numbers are far enough apart (cost is $10, value is $100).
The problem is, you can't directly ask the parties, because they don't want to reveal how high/low they're willing to go for no reason. So, you should essentially structure your questions into a pre-defined algorithm so that everyone is incentivized to reveal at least the ballpark of where their cost/value is. The study of how to structure those questions is a subset of mechanism design / information design, which is a branch of Econ related to game theory