If the only way to see their names at the top of the page in big font is to provide correct predictions... why not?
The classical prediction market relies on opinions of people who got selected because they really wanted to make money on the prediction market. What's the big difference?
Okay... I can imagine that if someone's goal is to bring attention to themselves, they might make correct predictions to get to the top, and then intentionally make shocking (incorrect) predictions to bring even more attention to them. Kinda like people with too much karma sometimes start trolling, because, why not.
What's the big difference?
Money is a MUCH better motivator.
In particular, making predictions is not costless. To consistently produce good forecasts you need to commit resources to the task -- off-the-cuff opinions are probably not going to make it. Why should serious people commit resources, including their valuable time, if the only benefit they get is seeing their name in big letters on top of a long list?
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