an official C&D should get you put on notice that they know you are there.
An Injunction is a little more serious-
A subpoena would follow next complete with discovery and then they subpoena your bank records, they get to the hosting company -
Then your processor
It's not worth it- just do what you have to do to rid yourself of this problem.
Take it down and be compliant-
Whatever money you made- be fine with it and move on..
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