4Chan doesn’t have their own personal payment processor that they’re responsible for. They’re tied into processors like stripe and accept all payments that make it to them on the US side. So long as it is legal, which is typically the only way that a payment actually goes through as processors refuse the obviously illegal cases like encompassing embargoes. If the UK doesn’t want payments going to 4chan through a processor that operates in their country, it’s on them to stop the payment processor on their end.

The UK knows this, the fines are just one step towards them petitioning processors.

Learn to read.

Not who you replied to, but: there is no legal, ethical, or moral, requirement for a business of one country to comply with the laws of another. If there was, all business would be beholden to the most overbearing government on any one subject. And just to specifically state it before it’s brought up, being tied into the international banking system doesn’t change that; if a state doesn’t want its citizenry doing business with a particular entity, it’s on them to stop it on their side or come to an agreement with the other’s government. Which does happen, especially with the conglomerate hegemony of components of the international banking system, but naturally that means that the only time any entity of a state is forced to comply with the laws of another is when their home-state demands it, which ultimately isn’t the laws of the other.

Wikipedia is the most accurate encyclopedia to date; its perceived unreliability as to its correctness is largely a misunderstanding that arose from misconceptions as to why one can’t (or shouldn’t, depending on case) cite it in academia. People think that it can’t be cited because of its unreliability but in reality it’s simply because it’s a third hand source; i.e. a resource.

Wikipedia is built near-purely on second hand sources, which is how all encyclopedias are intended to be constructed. As long as one ensures the validity of the second hand source used, encyclopedias are great resources.