It is sometimes difficult to find publicly released polling for many different races, especially the down ballot ones. Other polling is done but kept internally and not released for free.

If a fake polling company could be set up to release polls for underreported races that are being traded on prediction markets then you could make a good bit of money by timing your trades to the release of your fake poll.

The goal is not just to influence the prediction markets to game a profit, it would also be to hope that once the polls influence the prediction markets, that it will feed back into the voters to actually influence the result.