Real money from a virtual world, 2 SecondLife checks

Of course, you can make money in SecondLife. Some people sell their electronic creations, having a great succes in SL and some people invest in it, like me. These are two checks from Second Life. I need to tell you tho that i invested aprox. 4000 USD first. Now I have 5 SIMs, that have a value of 8475 USD, i cashed out these two checks and also I have made some payments in SecondLife, that worthed more then 600 USD.
To put it simple, i paid 4000 USD and I made 4475+500+700+600 = 6275 USD profit ... in nearly 7 months . Not bad , huh ?