After Facebook overhauled its messaging system and began using @facebook.com as a place to store user messages, it needed a new internal domain for its employees' emails. After settling on the shortened fb.com, Facebook had to purchase the domain from the American Farm Bureau (whose new domain is fb.org). And since nothing Facebook is involved with seems to come cheaply, they spent a pretty penny on acquiring the domain.
Can you guess how much Facebook spent to purchase fb.com?
How Much Did Facebook Pay to Purchase fb.com?
How much did Facebook spend to purchase fb.com?