Before you get amazed away by these crazy percentage growths just look at the drawdown. Most sensible people would not accept DD of more than 10%.
These guys start a few demos with different settings and if any of them blow up they just delete it. The successful ones are then used to show potential customers how good the robot is....until it blows up your account.
I could be wrong but I would always advise being cautious when something looks like this.