I seem to remember there were a number of news articles reporting the $100 million figure. I'm not privy to any inside information on this so I don't really know the answer. Tech Crunch is probably the most reliable for this kind of information.

A few of the $100 million articles:

http://www.brandrepublic.com/News/973571/Friendster-bought-1...

http://mediamemo.allthingsd.com/20091210/friendsters-caution...

http://www.itproportal.com/portal/news/article/2009/12/4/unk...

http://www.thetechherald.com/article.php/200949/4892/Friends...