Second Life has its own economy and a currency referred to as Linden Dollars (L$).
Residents (as fetishSL.com) regularly create new goods and services, and buy and sell them in the Second Life virtual world.
There are also currency exchanges where Residents can exchange real world currencies for L$. Though the exchange rate fluctuates, as of February 2007 it is reasonably stable at around L$ 266 to one US dollar.
These exchanges are open markets, except that Linden Lab sometimes changes in world Linden Dollar "sinks" or sells Linden dollars to attempt to keep the exchange rate relatively stable. A small percentage of Residents derive net incomes from this economy, ranging from a few hundred to several thousand US$ per month, while a larger percentage derive a gross income large enough to offset most of their expenditures in L$. The currency has become the subject of concern in economic circles in regard to possible taxation.
Why Fetish4Real use L$
Fetish4Real converts your buy in US$ to L$ using BuyLs.net, to provide the maximum of anonymity and provide all the credits cards to add funds to your account.