We haven't seen the worst of what gambling and prediction markets will do

https://www.derekthompson.org/p/we-havent-seen-the-worst-of-what

We Haven’t Seen the Worst of What Gambling and Prediction Markets Will Do to America

I don’t think people have thought hard enough about how bad this could get.

Derek Thompson
'Predictions' market is the silliest loophole for gambling. Honestly, more surprised Fanduel, DraftKings and the like who have spent millions on lobbying and buying licenses, are not fighting tooth and nail on this.

Especially when the "prediction" part isn't even part of the product, it is an accidental byproduct. No one pays for access to the predictions.

And they aren't predictions, they are more like "outcome-shaping" markets, since the more liquidity that gets dumped on a particular outcome, the more motivation there is to tamper with the real-world outcome, and at a certain point it will just always happen if it is billions of dollars.

The higher the liquidity involved, the less likely the real world outcome ends up being the same as it would have been if the prediction market had never existed. Very messy.

Those predictions are just market data, market data is often very expensive (my data usage at work is probably about $100k a year and i'm not even a trader), I imagine polymarket will be too when they are more established.
Happens already. Selling market data is part of how they finance themselves.