Excerpted from interesting recent news from the GJP, which is now entering the "official" tournament phase:

Meanwhile, we have updated the scoring sidebar accessible from the "About" tab of your forecasting website to provide forecasters affected by the new scoring rule with more information (this does not apply to prediction-market forecasters). We also will be using the FAQs to provide all of you with details about the number of forecasters participating in the tournament (currently over 2,700 on the Good Judgment Team, spread over 12 experimental conditions) and other topics that have prompted questions to our Help Desk or project administrator.