Daily Active Users (DAU) and Monthly Active Users (MAU) are determined by people using Facebook as a portal. Many, many, many people "login" to Twitter and Hulu and other websites using their Facebook IDs. These people are counted as DAU and MAU even if they never look at a page on Facebook. These numbers are not "real" users. At some point the truth will be known and people/advertisers will understand that FB has inflated information. Good luck all - you will need it!!!