French politicians passed a law that requires porn sites collect pii (identity) in order to access the site. PornHub won’t violate the privacy and security of their users, so they simply block the locales that pass such laws.

“Children should be reading good old stories like 120 days of Sodom, not this Pornhub filth” - probably some French conservative somewhere.

Protest on them trying to enact age consent laws.

By showing the message rather than Pornhub’s vast library of adult content, Aylo “is communicating directly with the French people to tell them how dangerous, how potentially privacy-infringing, and how ineffective the French law is”, Solomon Friedman of Aylo’s owner, Ethical Capital Partners, told reporters in a video call on Tuesday.

Paris has this year gradually introduced requirements for all adult websites to have users confirm their age with details like a credit card or ID document.

In a bid to preserve privacy, operators must offer a third-party “double-blind” option that would keep the platforms themselves from seeing users’ identifying information.

Edit - the sauce - Pornhub, YouPorn owner suspends access to French users over age verification law

Same reason it’s blocked in Florida.