Edit: The comment I replied to has been edited and originally explained the owner was Canadian but serves US customers and so should abide by US law.
I don't want to claim to agree or disagree, I'm just not sure how to work out what's right.
To be fair, MindGeek has an office in the US. Now, if they closed that office, the argument that they were subject to US law would be weaker.
EDIT: I edited my comment as I'm not willing to argue the merits of cross border law enforcement actions in this thread.
Really though, how does it work for a business like this? How do you not serve a specific country on the internet? I'm not aware of any technical solution to this - geoip databases simply aren't accurate.
For businesses where most customers pay, perhaps you can gate the site and verify payment details but that plainly doesn't work for the business model we're discussing as most people surely don't pay anything by design? This isn't Netflix?