Facebook is not really an anonymous advertising system. "Cambridge analytica" is not some anonymous advertising system access either. Facebook offered personal

Facebook is not really an anonymous advertising system. "Cambridge analytica" is not some anonymous advertising system access either. Facebook offered personal datafeeds as they offer to large MNC customers. This is the only way they make money using private and personal information including communication history, photos and videos to provide specific target audience feeds at an individual level with numbers to MNC customers. If it's an anonymous system and they follow the privacy laws in spirit not just enough to avoid prosecution, no one will pay them the premium. Since those anonymous statistics, company can collect on their own.