Yes he's the one. Based on his statement he hasn't been paid by the team (can't verify this). Reason I didn't include him was, we (unpaid participants) saw the desire in him wanting the team to pay the unpaid participants, he kept us updated and even sent screenshots of their conversations to the group. From my observations could be the developers intentionally kept him in the dark in regards to not approving removal of signature. Although the whole scheme might just be preplanned I don't have a clue.
I hope you'll get some sort of resolution and I understand your unwillingness to flag him but if it doesn't get resolved in a reasonable amount of time I would suggest to create a flag on Nekoma2018. Whether it's malice or extreme incompetence I think it deserves a warning.