[AnthonyMouse]

> On the other hand, at the point where the prediction market winnings are material enough that they might alter the underlying decision itself, you've clearly got an antisocial structure.

How is that supposed to be determined?

There are many decisions that have only minor implications to the party making them (they're choosing between two nearly-equivalent alternatives) but massive implications for third parties (the company or city chosen gets a huge gain and knowing which one is valuable information). When the decision itself is essentially a coin flip, any prediction market winnings could alter the underlying decision. And whether it's that close of a decision is the thing the market would be trying to predict rather than something you already know.