Bata17, have you even read the white paper...... I believe they earn on the volumes of trades being made. So their profits are not relying on the amounts of growth on investors accounts-like typical performance fees. Every trade that gets made, they earn a small amount of profit from the brokers. Basically as long as there is trading activity, they'll make profits. I think thats the sustainability of their profits.
So the traders can just trade volume to make commission... not that sustainable for the clients in the long term?