It is very simple 0. No one in their right mind would sell profitable strategy. NO ONE. Very few might show it for free to friends or people they like. The only exception was SOES bandits.
Saying the above, I kinda know 1 case. But it was almost Like free
Padu, your biggest mistake is to think that you know something, where in reality you know shit. The difference between you and I is that I know that I know shit, and developed my models accordingly.
Ninja is one of the most robust platforms out there. You have full power of C# at your disposal. And NT8 is multi threaded, so performance is amazing as well.
Backtest vs real have nothing to do with the platform.