I'd love to see a concept like this work but it is very difficult to truly align the incentives between recruiters and candidates or companies. Like you said it's just like real estate, a turnover game where the broker doesn't really care about optimal outcomes for the transacting parties.
That said this could still add a lot of value for students - I certainly had no clue about career paths when I was in school. So I hope they figure out a way to make it work for everyone.