Have a look at this:
So as far as I know, these stars are redeemable for money. Seems like the silliest idea, until you see some people are already using it.
In the screen cap example, it's a model / singer who gets stars from fans and can redeem these for money. The person actually running that page is the
mother of the singer, and I imagine she's the one cashing in on her daughter's popularity. But if this works country to country ( model singer is from Asia, fans are
from Europe / US ) could this be a sneaky way to transfer money ?