Fake women on facebook selling nike shoes?

For all you facebook users, have you noticed the influx of gorgeous women who "work for nike/insert shoe company here" and go on a frenzy tagging sneakers followed by a link to the supposed website selling the shoes? Now it is quite obvious that these profiles are very fake and are more than likely hackers, but my main question is where do these guys steal these ladies' pics from? Where do they originate from and what type of information is at stake when you add them?Some are even bold enough to reply to some of the duped guys who write on their walls, misspelling common words and using terrible grammar. What gives?