Linkedin has been fined for their use of personal data for ad purposes (albeit through the RGPD framework after the CNIL passed the case to them):
https://www.lemonde.fr/pixels/article/2024/10/24/donnees-per...
Facebook is also targeted under the RGPD, we've been amply seeing the news. The CNIL doesn't need to be doing everything either.
There is and will be no silver bullet completely stopping companies from building databases. I see having an active agency responding to user feedback as at least a decent counterbalance to it, when it's a complete shit show in so many other countries.
> government
Right now the government having extensive databases allows people to manage all their health payments and data in one place, including any hospital getting access to their full history when they're brought in pain barely able to speak.
That also includes ease to vote on the net within minutes, check school records on a standardized site etc.
It's not perfect and probably abused in some way, but right now the net benefit at scale largely overshadows those IMHO.