Open interest might be a better metric to measure the influence of prediction markets, as it reflects participants' risk-taking and capital commitment. Currently, Kalshi and Polymarket together account for nearly 90% of the open interest share. Of the remaining 10%, Opinion takes 8 points, and Predict Fun takes 1 point. As a challenger, Predict Fun has introduced an interest-bearing feature for open positions. Wonder if this will become the industry standard in the future