It's interesting to see that you have passed a challenged but don't know how any of the prop firms work. None of them is legit because they cannot be regulated as they are not actual financial companies. The prop firms trade with simulated funds on demo accounts provided by legit brokers, therefore the prop firms themselves cannot be regulated by any regulatory bodies.

Also, if you can make money from them, then make as much as you can since your only risk is the amount you pay to get the funded account open.