It's been years we knew that.
The solution, if you think this is scary, is to *not* use these services, or as little as possible.
There are also privacy settings on each which reduce the damage a little.
And for instance, using Google search engine without being logged in is already better.
(Pour un avis plus négatif: https://theconversation.com/il-est-impossible-de-proteger-les-utilisateurs-de-facebook-contre-lexploitation-de-leurs-donnees-93669)