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I came across STOX from a promotion on Facebook where they asked people to predict the outcome of the world cup. In the age of social media where peoples opinion are often influenced by others, this kind of prediction market might not actually work well.
I came across James Surowiecki, Wisdom of crowd where he stated that Diversity, independence, decentralization and aggregation are necessary criteria for the crowd to be wise, which is nearly impossible in the age of social media.
But come to think of it, with the monetary reward ( tokens ) attached to the prediction. It will allow people to make reasonable predictions based on instinct and not emotions since people are likely going to predict their country to win out of perceived patriotism.