If 4chan continues to ignore Ofcom, the forum could be blocked in the UK. And 4chan could face even bigger fines totaling about $23 million or 10 percent of 4chan’s worldwide turnover, whichever is higher. 4chan also faces potential arrest and/or “imprisonment for a term of up to two years,” the lawsuit said.
With wire fraud and csam, the activity is illegal in the host country as well as the target country, which is not the case here.
By your logic, any website with advertising is operating in EVERY country worldwide.