Tbh i don't like do anything through PM, it's seems a bit suspicious
Some dubious people always hide under the pm to hideth their fraudulent activities. Op should explain everything here if he is really can do what he claims to do. I believe to start an exchange involved a lot of security and marketing and op is already with neg trust on his account and that is a clear sign that people or traders funds can easily get hack by op himself after opening the exchange for you.
Not all goes thru PM would be considered shady but if he would able to post up publicly then it would be much preferable so that peoples doubts would be removed.
This do also shows transparency and as mentioned about his current trust its already a red flag for people to look on.So this basically means that he's isnt trustable enough
to handle out funds.