Facebook is barely making 1 billion per year howcome Mark Zuckerberg has US$12.5 billion?

[Singam]

how mark zuckerberg have Net worth US$12.5 billion, but twitter owner and myspace owner not even have 1billion net worth???
i have general knowledge about social networking site they make money by advertisement, but how advertisments can bring mark zuckerberg US$12.5 billion net worth?? but facebook revenue is barely 1billion in 2009 (Revenue US$800 million 2009 est.)

lets take a look how many subscribers they have:

facebook 500 000 000

twitter 175 000 000
myspace 100 000 000+

the different between twitter and facebook is 300million users. i understand. but mark zuckerberg net worth is US$12.5 billion. but twitter owner don't even have 1billion, and myspace owner also don't even have 1billion also. how come?? please someone explain... PLEASE!!!

[dan]

I suggest you contact Facebook about this?
THEY are going to know alot more than what people on Yahoo knows.

[Tommy Day]

Maybe Mark Zuckerberg has more sites owned and stuff like that. Not only by facebook he has to earn he's money but he can have other sites to..