What is the LEN technology?
LEN turns the standard market depth model into an improved one with additional liquidity at the point where demand meets supply. You don't need any special agreements for that - just open API's that crypto exchanges publish for interacting with third-party services.
How much is this method safe to use and what experience have you used in demo mode? This is interesting because if everything is fine with security then the project can give excellent profits to all its investors simply by the fact of its use.