You need to read the thread or at least skim through the contents of this 49-50 paged thread to understand what actually happened. Its really complicated.
It's pretty simple: master-p stopped returning coins.
Some new account claimed to be him and said he had sold his account; he signed a message to prove it - but the sale was only for 2 BTC so that makes no sense
Some other new account claimed to be him and said he had been hacked; he signed a message to prove it - but the alleged hacker left all the stolen coins in the escrow wallet for days so that makes no sense either
I expect it's just a regular exit scam like many others.
Did I miss anything of substance?