I had a profile for modelling and then got an offer to be in a movie for Channel 9 (A main channel station here)
Buuuuuuut I pussied out, then I deleted my account (or w.e the fuck it's called).
Currently enrolling to have a profile with an agency again as I don't really give a shit anymore as long as I make some dosh.
I've had family friends that have been in ads as extras (You get offered this stuff too) and they've been paid from hundreds to a couple of thousand each time.
And they were young-ish too, around 10-15 years old.