They've certainly turned out different than Scott Alexander predicted, once the markets were opened up to people who are not in the wider rationalist community.
Not foreseeing the amount of sports betting that would take place, is kind of a failure of rationality in the first place, and I say this as someone who absolutely respects the community in general.
You should have lost your respect for the "rationalist" "community" a long time ago. They are aggressively wrong about everything, and most of them are eugenicists.