Passing rate translated to profit margin means that if 1% achieved an (average) payout it is 90%, 2% means 80%, 3%=70% and 4%=still 60% profit margin. That means on a 1% hit rate for the prop firm, traders who got a payout of all starters on challenges, the price for the challenge could be discounted 90% too to be breakeven. So the profit margin tells us the potential discount rate on a breakeven point for the prop firm, where they are breakeven in profits. So I am not surprised that offers like Autoproptrader with score about 12 and GoatfundingFX with score of ca. 14 are possible. And even EternityGlobalFX score of 25 is explainable. Hmm...?
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