Unfortunately, you are under the misconception that the funds were invested, they were not and never were. Dummy trades were created to make it look legitimate. New investors monies were used to fund withdrawals from the earlier investors, to add to the legitimacy. I repeat, no money was EVER invested. This was a pyramid scam, with an elaborate cover story of Forex trading using CFDs, limiting risk with stop losses and controlling access to the markets with trading timeframes of less than 60 minutes.
The icing on the cake with this scam, was the conviction the recruiters gave to substantiate and legitimise this scam to their closest family and friends. Takes a real 'C yoU Next Tuesday' to screw over their family and friends.