Other strategic information could include: connected third
party application data; comments and likes on public Facebook pages; internet browsing history through Facebook APIs and
scripts; consumer loyalty
programs, mobile app logins; publicly shared photos and profile information that users forget about; and (I'm presuming) more mundane tactics such as harnessing unassuming personality «quizzes» on Facebook that capture invaluable psychometric data people readily share with their friends and families, but not with a psychological voter profiling firm.