You can gain reputation by simply forecasting the same outcome as the (publicly available) average probability of everybody - so a user that forgets to forecast on questions is gonna be worse off than a bot who just follows the crowd.

However it gets more interesting when you try to beat the crowd - because you have to take risk and disagree with the masses. You will either end up with negative reputation or a very large one. You can learn more about scoring functions and how to measure the accuracy of everyone's forecasts: https://www.metaculus.com/help/scoring/

Personally I have opened one question, and it involves predicting the net sales of Apple Vision Pro until 2025: https://www.metaculus.com/questions/17407/apple-vision-pro-n...