Facebook's first ads started running in 2004. The one pictured here was likely a "flyer," which Facebook sold to small businesses for $10 to $40 a day, according to Facebook's first ad salesman, Kevin Colleran.
Later that same month, Facebook opened up to anyone 13 or older with a valid e-mail address.
It also launched Facebook platform and video later in the year. By July, Facebook hit 30 million active members.
In September 2009, Facebook surpassed 300 million users.
Before the end of July 2010, Facebook would hit half a billion users.
You've probably long forgotten them, but Facebook Questions also made their debut in 2010.