There have been some recent reports about Zynga considering leaving Facebook which most are assuming is due to Facebook Credits and the revenue money split. If true, this along with Facebook’s recent privacy changes can really become the perfect storm that turns Facebook into GhostBook. You see, it’s been reported that 66% of all traffic to Facebook is for it’s Games. If this happens, many of today’s daily visitors may drop their visits to the site which can create a rather dramatic ripple. Facebook really needs Zynga!

Could Facebook become the next Friendster or MySpace?
If Zynga leaves, it may. My gut tells me that many of my connected friends which keep me on Facebook may stop logging in frequently if the games disappeared. The other set of friends that are not social gamers are usually on other services such as Twitter, LinkedIn or Google Buzz anyway. I don’t like Farmville, Mafia Wars, CafeWorld in my social streams but ironically those games are the glue that keep many of my present and past “real life friends” engaged with Facebook. Could the things I dislike the most on Facebook may help me disappear if they disappear? Zynga may be the glue that may loosen to make it easier for those looking to leave due to privacy concerns but don’t due to friends.

Though I doubt that Zynga will fully leave the platform, suddenly Facebook’s Open Social API and attempt to be the center of the Internet looks much more irrelevant if Facebook shrinks down to 1/3 of it’s current size.