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Re:Crowdsourcing The Crystal Ball by DanielBMarkham on Tuesday October 16, 2007 @06:15PM (#68773)
"Vested interest" can include all sorts of things: money, reputation, glory, play money, prestige, etc.

And there are all sorts of markets that use real money to trade predictions. They're called futures markets.

Re:Crowdsourcing The Crystal Ball by karzeem on Thursday October 18, 2007 @01:35AM (#69536)
Futures markets deal with financial instruments, not predictions about stuff like when an iPhone nano will come out.