You mean, turn it into a fun minor hobby-time of sharing popular-opinions that are mostly weighted by how common they are, rather than dangling a huge perverse-incentive in front of an insider so that they reveal (or cause) a strong outcome through greed?

Actually, there's another perverse incentive operating on a higher level, when it comes for the people running things: "How is my prediction-market startup supposed to IPO for a bajillion dollars if we're not first-in-line for having sometimes-corrupt insider data? Nobody's going to pay me that much for a company that's just a spicier form of polling."