Do you have an example of polymarket betters changing the outcome of an event?
Not Polymatket, but there's a humorous case of the Sutton FC goalkeeper eating a pork pie on TV, thus resolving a bet on whether he would do so.
How can we possibly find an example, if the names of the betters aren't public? There are public bets on activities from the IS government that can easily be used by people that control the outcome.
many many, like that stuff with the "will someone throw something at X basketball game" and then someone kept doing it, etc
Here's one:
https://www.zerohedge.com/crypto/coinbase-ceos-bizarre-final...