This makes sense to me, but isn't there a risk of increasing the potential payoff high enough that someone is motivated to go out and make the yes side happen?
Consider this bot running on us military outcomes or something.
You're thinking like an engineer and making the laughable assumption that "prediction markets" are markets. It's totally unregulated with all sorts of grifts and cheats. One of the platforms was promoting a high-return bet against Rory at the Masters yesterday.
You can make money off of all sorts of stuff. You can "sell" the bets, so there's lots of live pump and dump.
We've gone full circle. The bookie with no neck that smelled like onions was more honest than these platforms.
By design it's a game where people with inside knowledge or enough power to bend reality can steal money from people with gambling addiction. Automating your addiction might not be the best move.