Did Facebook beat SpamCop to the top?

We don’t talk enough about the impact that fraud has had in shaping the current commercial landscape of the Internet.

If SPAM had not killed email, would users need to authenticate their emails via a tool like Facebook? A few years ago, I received emails directly from my friends. Now, I receive emails from my friends via Facebook.

Whether by default or design, Facebook is the most successful identity validation service in town.

(See previously: why Wikipedia is so popular.)