How much did it make at peak and for how long has it existed? How much work did you put into it?
That's one area where Linden Labs really need to put a lot of work in to make it a viable business opportunity for anyone thinking of a quick buck. Filing a DMCA is far from fun, but where there's money, there's theft.
I do believe that anyone with the will to do so can still easily become successful and make a few dollars if they put a little thought and time in, also knowing most of your market is made up of bored housewives helps.