Comment by NoboruWataya

From the article it looks like the fine here is basically for not complying with information requests (rather than a full investigation having concluded that 4chan is in violation of the substance of the Act). Ofcom probably thought 4chan would just respond to the requests by geoblocking the UK, which would have been good enough for them. But once their bluff was called, they really had no choice but to levy the fine. Announcing you are investigating someone for violating the law and then not bothering to fine them when they very clearly ignore your investigation (which is itself a violation of the law) is more destructive to your credibility than anything.

It's not like the fine has zero consequences. It will likely restrict 4chan and its senior officials from visiting or dealing with the UK, which I'm sure is annoying on a personal level if nothing else. I don't know if Ofcom currently has the power to order ISPs to block non-compliant domains, but if it doesn't you can bet it will be using this to push for that power.

As for not being able to intimidate the long tail: for US companies, yes this might further weaken Ofcom's influence over them. But companies with a UK presence who try to call Ofcom's bluff after this are likely going to have a bad time.