15. Many large mixers have shut down due to legal action or unprofitability. Tornado Cash has been sanctioned, and their developers have been unfairly demonized. Yet - ChipMixer is running normally (on the clearnet, at that!) and no regulatory action has been taken whatsoever.
FYI, these days chipmixer only use clearnet as informational purpose.
What has been discussed in many locations is the fact that CM is a free service. You can tip or send non round amounts to hide things but in the end they do not charge a fee so it's a more difficult case to make that they were profiting from it. Which does make a difference if you want to go after them.
Also, due to the nature of the way they do business, with the pre made outputs, even if they do get taken down, if they don't keep a lot funds on that server (and they should not) they could be up and running again in a few minutes. Their main
BTC node that has the addresses / private keys can be sitting anywhere in the world and the private keys of the pre-done work can also be anywhere. It's a lot of work to do the programming the 1st time. After that it's not that tough.
Unlike a lot of the other services that were a for profit enterprise because they charged up front and were public about who they were and everything else.
-Dave