Do people actually buy into it - since if the returns were good why would they sell the software? Is there any public and verifiable evidence that it produces returns that outperform the market?
I use a trading-bot myself, not Gunbot though.
To profit in the long-term one would need different buy strategies for different market conditions, example Bear, Neutral and Bull.
Most people will be better off sticking to the regular trading, or hodling.