A ton of dating market friction is due to uncertainty about the other person & asymmetry of knowledge about them (like the famous "market for lemons" Econ paper). Prediction markets inside [dating apps with transparency of each user's behavioral history] could be used to substantially reduce uncertainty about both the past and future behavior of each participant. (E.g all the girls Chad has hooked up with through the app and then ghosted could add their experiences to a public record on Chad's profile and bet on whether he will do the same thing to his next conquest. This will substantially reduce amount of regretted time people waste dating people who don't align with their long term goals, and probably reduce the gap between intended and realized fertility)