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1. Because you're supporting a ponzi, and it's operator. May I say, operating a ponzi is illegal, and by investing, you're assisting the operator, and you're basically assisting in a crime.
Sounds like the "if you buy drugs, you're sponsoring terrorism" argument. If operating a ponzi is illegal (it is, in US, where theymos' at), so is facilitating such operations (running a subforum where 90% of the users are participating in/promoting ponzis). If OP is breaking the law, so is theymos. What's sauce for the goose is sauce for the gander. Neg rate theymos too.
We need to get over this illegal aspect, bitcoin is illegal in some areas.
Bitcoin isn't illegal in US, theymos is a US national & is running this forum from US soil. That's what counts, legally.
Then why is poker advertised here? Same goes for the sportsbooks? That does not hold up if we are using American laws.