Hey your script is not exchange but hyip minning script....thats two big different script..that is why dont want to vouch it or even post the demo site in public... 
Hi
not understand what you said and also what is hyip mining script.
you are saying my script is not cryptocurrency exchanging script because i don't publish demo?
maybe you know better than me that what script i have coded
i show demo to only whom that wants run bitcoin exchanging website.