General Motors un-friending of Facebook ads spells trouble for users | Macworld:

Facebook is closing in on one billion active users (about 14 percent of the world’s population), but it seems no one’s really sure if those all those eyeballs convert into value for advertisers.

Because nobody has more than one Facebook account.  Look, my local newspaper requires a Facebook account just to post comments.  I don't post there any more, but have considered a fake account to do so.  I've also got an account for testing apps I've written against Facebook APIs.  There are tons of reasons for folks to create virtual personalities.

Virtual is not real.   They might as well say, "Facebook is closing in on one billion active accounts (about 2,000,000% of the world's bonobo population)."  Just as in/accurate.