You can’t put a price on some round-rim glasses wearing EU bureaucrat named Klaus-Dietrich von Regulieren sleeping soundly because of that banner.
This is why people complain about the unclear and bureaucratic nature of these laws, it leads to an over complicated investigation and compliance isn't always simple - meaning the safest option is to comply at the highest level and degrade the user experience.
The sites plastering those everywhere are doing a malicious compliance, pure and simple