Even if the regulators attacked more websites it wouldn't matter. You'd just have more and more websites that block European users.
You can't expect websites to give you a pop up that asks whether they can monetize your visit or not. Everyone's going to click "refuse" because ads are annoying. As a consequence your website makes no money. At that point why run the website at all?
Regulators don't want to regulate too hard, because it would ruin all the freely available websites.