Pretty sure, otherwise hunderds of accounts should have come up when searching for THIS particular memo. It were only these accounts. Coincidentally all known accounts from Blocktrades.

I don't know why you would assume that. If Darthknight's only transfers into the exchange were the ones from their own account and times they purchased from the Blocktrades exchange, then you would not see the memo used in other places.

As a trader myself, I know about the arbitrage, and its smal percentages. Fees from this exchange are high, so I bet you gonna wait a long time for the right opportunity to make a percentage. I know for a fact my time is better spend.

I agree it is an unusual thing to do, but it is not outside the realm of possibility. We really don't know the exact market conditions at the time of the transactions, or what was going through the user's head. Also, not every move that traders make is necessarily smart :)

I do, apparently, the current blockproducers and investors feel the same.

Yes, I get that. Everyone is entitled to their opinion, and allowed to make decisions and take actions based on their opinions. It does not mean they are right though.

Reached out? I have actually checked that and cant find a thing. The only things darthknight did was spamming and abusing.

I know multiple people that got in contact with them between the time the soft-fork was enabled and when their accounts were frozen. They seem to have a desire to remain somewhat anonymous so it is not surprising that you are not finding a trail of communication, but there are other stakeholders that they are in communication with.