I thought it was supposed to be one out of the three questions answered?
anyhoos, I'm just guessing that the answer was - they live somewhere else, not on the island. (actually from carl, it sounded like they also live on the same island as the main cast! maybe on the other side or something?)
The island where Jack was captive is just their work place. working on what I would like to know, lol! it'd be interesting to see where their actual "home" is though.
edit: on a side note, it was really interesting how Jack was marked by Bai Ling's character, and Juliette gets marked as well by Ben. and they're going to form an alliance! yay!