With the UK, they can block content that’s known to be NSFW. With Mississippi, they get fined if kids access the site at all if somebody else on there sees something NSFW.

My understanding is that it applies to every site which hosts any NSFW content, whether or not minors can access it

The problem isn’t that the state is blocking it; its that they threatened to impose a $10,000 fine for each user who can access the site without first proving their age.

You can afford that risk if you live outside the US. Not if you’re a US corporation