> A 98% success rate is not going to be particularly discouraging to them.

The thing is, you can afford sticking the finger to the UK if you do not have any business interests there. A platform like 4chan won't be bothered even if the UK government says "all payments to be made towards 4chan for advertising are hereby seized until the fine is paid off". But places like Twitter or Meta, that derive millions if not billions of euros a year from the UK and European advertisers? Now that's a lot of money to lose, money that even American shareholders will complain about it being missing from the revenue sheet.