“Linden Lab has updated Second Life’s Terms of Service regarding Linden Dollars, the world’s official currency, in a way that will impact third party sites which exchange L$ for real money or other virtual currency, including Bitcoin. In the new Terms of Service, however: ‘[T]o better protect Second Life users against fraud, the updated Terms of Service make it clear that trading of Linden dollars (L$) on exchanges other than the LindeX, Second Life’s official L$ exchange, is not authorized or allowed.’ The given reason seems strange on its face, because Second Life users have been able to exchange Linden Dollars for real currency on third party sites since 2004.”
http://nwn.blogs.com/nwn/2013/05/linden-dollar-terms-of-service-change.html