what is the revenue model for a 'Social Networking' Sites ?

Hi, I am going a asked a question of worth of one million US dollar to all of you,Please be ready to reply ?

The question is " Where is god ? "

Just chill guys I know that no one has the reply of this question but my next question has the same
degree of curiosity? So be ready for reply ?
what is the revenue model for a 'Social Networking' Sites ?

This is the most common question which are coming in the mind of each and every person who is browsing thesocial networking sites and in fact if we look up the comment of the care taker of the most popular site Facebook, the founder and CEO, Mr. Mark Zuckerber is saying that " Not a problem, we're all about traffic... for now. " It's means Facebook Management is also not clear with them self what they wanted to with the money of their investors and the people who are paying them as a client?

So When Facebook has this Vision then Please stop thinking
about other social networking site like myspace, twitter and
other such sites...because all of them looks like on the race
track of HOTMAIL.com and thinking that" God is responsible
for providing equal opportunity to all of us and we will also get the same.."

What a dream? but no one has to forget the DOT COM bust
stories.. Still a lot of Advertiser are surrendering their efforts on
Social Networking sites, If you aware for the exercise which
P&G has done with the FACEBOOK , where P&G and facebook
has achieved a little bit success only because of they have spent
significant money on promotion, such as their Crest Whitestrips
campaign. Proctor & Gamble utilized free concerts and free movie
screenings to attract members to that group, eventually drawing
14,000 fans. When the promotions stopped, however, the fans
started to trickle away. Neither Facebook nor Proctor & Gamble
offered any solid data on generated sales.

So when a big company working with Social Networking leader is
still out of pocket, what benefits small advertiser and small sites
will get out of it ? Still Require a big brain storming on this !

I am not against of any change but until and unless these social
site will not able to give the feeling of Value for Money they are
not able to achieve any success in a long run.

-tapesh