So basically you've made a shitty MPEx, six months late and with all the credibility of a 0 WoT rating. Good luck.
You'd look much less like an idiot if you just said that to start off, rather than wait for me to say it.
I don't know much about MPEx - never even tried using it, since your system looks in a way that scares me off the first second after I load the page.
But as far as I've managed to learn about MPEx, it is a trading platform, whilst #assets-otc is a contract management system where the actual trading is off the scope.
Moreover, MPEx does use PGP signatures, but only as an authentication method for trading transactions and withdrawal requests. And as far as I understand what a "withdrawal requests" means, it means that there is still money stored in the service, that can be stolen and thus one day probably will - if not by you (the owner), then by somebody else (a hacker)..
So as for me, MPEx is a completely different idea, based on a completely different security concept.
Not to mention that it looks just like shit and the interference is anything but intuitive, even though it is already six months old... you obviously have done a great job for the last six months, improving the service for your customers, making it so much more user friendly... fuck yeah! If I had been a masochist, I would have probably liked trying MPEx... though hammering a nail with a piece of wool into my own ass would still seem to be a simpler process than using the service that you are so proud of.
And my WoT rating is 5, not 0 - so don't lie.
But whatever it would have been it does not matter at all, because unlike you, I do not need anyone to trust me with his money.
I am giving out to people a top security bookkeeping and dividend payment service for free. And beat me on this, if you can. Good luck.
Wrapping it up: you'd look much less like an idiot if you just didn't come to this topic advertising your shit using my brilliant idea as the bait.