According to news outlets, German authorities seized servers and crypto worth $46 million. US authorities have accused Chipmixer of laundering over $3 billion since 2017. If international authorities will try to seize all funds related to Chipmixer as they are deemed to be illicit, then it is possible that an attempt could be made by authorities to retrieve all the funds that have been paid out as signature campaign fees as they have effectively promoted/advertised the service.
They should first go after Google for receiving money for scam advertising (which happens on a large scale, every single day).
This could end up being very messy for a lot of members in the forum that participated in their signature campaigns if the FBI and US justice department decide to force forum members to repay all the money they received from Chipmixer as signature campaign income.
Eh... seems like a waste of time. Not everyone is from the US, and I don't think mixers by themselves are illegal.
The paper on ChipMixer by the DoJ implies that their crimes were:
1. money laundering;
2. operating an unlicensed money-transmitting business;
3. identity theft.
Would CM be hunted if they specifically analyzed the coins received before mixing them? Like, imagine them contacting Chain analysis and asking if the coins a user sent came from a DNM, and if so, prompting the user for his KYC documents... (crime 1)
Would they be hunted if they disallowed US customers and enforced that by also taking KYC documents (thus not being an "unlicensed money-transmitting business" in the US? (crime 2)
And last, if ChipMixer didn't register his PayPal accounts with bought/stolen documents? (crime 3)