And 9x/10 when you track down Perwinkle LLC you'll find that it's owned by a couple American brothers who own a successful regional HVAC business and everything they are doing is legal.
People love to act as if all this offshore stuff is frequently closely connected to illegal things but if you just randomly pull samples you'll be hard pressed to find anything that isn't just a case of someone completely legally doing what the law incentivizes. If there was actually anywhere near as high a crime to not-crime ratio as people imply every bureaucrat with political ambitions would be all over it.