You may be in interested in the domain of litigation finance then: https://techcrunch.com/2019/09/17/this-young-litigation-finance-startup-just-secured-100-mill

You may be in interested in the domain of litigation finance then: https://techcrunch.com/2019/09/17/this-young-litigation-finance-startup-just-secured-100-million-to-go-after-cases-it-thinks-are-winners https://techcrunch.com/2019/09/17/this-young-litigation-fina... Not quite the same thing as what you mentioned, but by creating financing that evaluates cases by their potential for a payoff, this should seed the kind of marketplace you mentioned.