A bagel shop in Manhattan also accepts money from UK citizens, but that doesn't mean it's subject to UK law.

If that bagel shop will ship bagels to UK soil or accepting money from UK citizens who are currently in UK as 4chan does, it will be subject to UK laws regardless of whether it has legal presence, assets etc. This is not matter of jurisdiction as some of commenters here believe.

UK has limited enforcement options, of course, but it’s their sovereign right to prevent illegal activities and/or punish for them within their capabilities. This is why 4chan lawyers are asking for political response as if UK were a rogue American colony.

I don't think crypto housed outside the UK counts, but I could be wrong. But it's not like there is a UK arm of the company they can even sue.

What are they gonna do, stop UK citizens from spending money how they want? Or will they try to invade the US again? Lol