Earlier quoted context omitted.
Facebook has 650M active users. They always measure and cite active users, to their credit they do not fudge around with the numbers in their PR Skype is 170M active (quarterly, Facebook is monthly), and 680M total registered. A lot more people have given Skype their payment details than have Facebook - which results in Skype monetizing a lot better (but still not awesome monetization - yet, but it is improving). Edi…
How many registered users does FB have in total?
I remember reading a blog post where somebody tried to calculate it by enumerating user ID's, but he didn't come to a clear conclusion.
the FB key numbers are 650M active per month, 50% of that active per day. I wish other companies were as simple and transparent with their own stats PR - instead of nonsense like 'messages processed per fortnight', 'total logins', etc. etc.