That is true Song. That is one of the things I saw as well.
However, as you increase your starting account funds, you can increase the amount of money available for each trade - hense increase the $$ made on each trade. The factor of commissions and fees starts to go down as you increase the profitability of each trade. It becomes a smaller and smaller factor in the overall return. So you are right that it will drop that percentage, but not by much as you increase the trade $$. Remember, they were starting off with a small funded account of 25k. Times that by 10 and you can estimate what the return could be at 25-28% - in 12 days!
Should be an interesting ride once people realize this.