As someone who has been the target of an FBI investigation for what was effectively criminal copyright infringement (later arrested and did time in prison), my only takeaway is that this, if anything, should just be a civil suit just like so many other similar cases of copyright issues.
In my personal experience, the priorities of the FBI are typically highly politically motivated. The exceptions are if you’re doing something seriously icky, or doing fraud that deceives people.
For those interested in what’s reported and what actually happens, I’ve made some comments on my case and my experience here: https://prison.josh.mn