01 – Search at google for google dashboard or browse to
http://www.google.com/dashboard
02 – Search at google for google alerts or browse to:
03 – Arpu – Average revenue per user:
https://en.wikipedia.org/wiki/Average_revenue_per_user
04 – How much are you worth? Average revenue per user at Google, Facebook and Twitter:
05 – Facebook privacy guide:
https://www.facebook.com/about/basics/