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Abusing the same signature campaign isn't contested here, so I assume that part is true.
Where is abuse part?
I don't see it and I can't find it.
You're right. It was contested in the OP, I overlooked that (I really hate phone screens!).
For example, if DarkStar_ close chipmixer signature campaign and after some time reopens it, and you ask them from this account "do I need to join again" and after few minutes you ask them the same question from main account, should both accounts be tagged for abusing campaigns?
From all information collected I see only 1 account was in that campaign.
This sounds like a very reasonable explanation, which should at least count as "reasonable doubt".
It seems like some people are now "collateral damage" from the large number of cheaters, spammers and copy/pasters, and the case against OP is far from airtight.
@OP: you should probably move (bottom-left) this thread to
Reputation. Mods aren't going to help you, Reputation is the right board to discuss this.