Does facebook need users? Considering shadow profiles, and the wide base of installation on websites all over the world, they can continue with big data genera

Does facebook need users? Considering shadow profiles, and the wide base of installation on websites all over the world, they can continue with big data generation without anyone ever reaching out to them. Instagram continues to grow, along with Whatsapp. The facebook (shadow profile) data and the real user profiles of those apps will be correlated and ads will be targeted to users on those platforms. They will lose revenue from the owners of facebook "pages", but I'd be willing to bet that they will expand their API to to serve facebook ads on web sites, if they feel the need to bandage that platform when they have some more desirable platforms already underway.