I see all these addresses OP published in the opening post and thanks to his great detective work managed to track everything.

We can clearly see that pre-mined MNX was sent and sold on exchanges. Was Minexcoin team entitled to do this at the time?

I think this is the most important question to answer. Of course, I understand how catastrophic impact it has on the price but first, we need to know the answer to be able to proceed further.