But I didn't say "in the UK", I said "from UK users". If Imgur monetized anything coming from a user in the UK then they can no longer pretend they weren't offering a service. They knowingly used that data to make money, it wasn't that someone accessed the site and that was the end of it.
It's the difference between going in and out of a restaurant, compared to sitting down, checking out the menu, and eating then refusing to pay because the prices are ridiculous. The latter removes any pretense of deniability. If they disagreed with a ridiculous law they should have put in a modicum of effort to block the service in the UK from the start. Instead they made money for as long as they could and now pretend to stand up for the little guy and fight abuse.