Too bad for us that they are not a good mixer, as it is a good idea that someone could mix their coins with a reliable mixer and get "clean" coins (traceable back to exchanges, etc.) back.  Because many US exchanges and merchants do not like "dirty" coins (tainted by drug markets, thefts, ransomware, etc.) , there would likely be a real demand for such clean ones.

Someone will probably come along in due course and offer a straightforward and honest service.  And probably make lots of money...