06/26/2010 05:12 am ET Updated May 25, 2011

Craigslist Sex Ads Make Up A Third Of Revenues

Craigslist doesn't have the most revenues of online companies, but it is almost without a doubt the most profitable relative to size.

They have the highest revenues per employee of any blue chip company in the the tech industry.

But a lot of that revenue comes from sex ads, and in particular listings for prostitution, which are illegal in the US and many countries.