I'm wondering the same thing too, why share profit with another trader when you can do the trading yourself, you have the fund and the skill, it's to apply them in trading and keep all the profits to your self. What if the partner traders don't follow his instructions and probably starts losing his money, what will he do? I hope he finds genuine traders that'll follow his instructions in trading for him, and I wish him all the best.
There are just those people that think it's easier to do such and make money from others skills in trading. While sitting there, giving them the fund and will just wait for the return. But in reality, this doesn't come out good in the end. Many will scam the funder and the trader will just convince the investor that they've lost and things did went south and that's it, kaboom, the money is gone foreve.