It depends on the market of course. In looking it up the only markets that have ever come even close to that sort of payout are things like presidential elections where the risks of insiderism or gaming are negligible, and there's extremely large public interest in it.
Nobody's making millions betting on things like the weather.
>where the risks of insiderism or gaming are negligible, and there's extremely large public interest in it.
So what's the point of polymarket, then? If at best we get "negligible" "insiderism", how is it that we are supposed to be benefitting from this as a society the way OP and others insist that revealing insider preferences "would"