Paranormal Activity? Actors pay?

ok paranormal activity is a movie that was made for 15k and its made over 70 million and will make over 100 for sure. the girl actress was paid about $500 for her role in the movie. now im wondering if she got paid more now that the movie became a great success??? most answers will be YES but i want some sort of source. It will seem only obvious that they are stinking rich by now, but come to remember the Napoleon Dynamite movie that was made with less than 13K and made around 60 million. The actors were only paid around $600 even after the movie made all that money, thats with the exemption of Efren Ramirez who was under a union and was able to get his share of the millions while the other actors paid for half a months rent for their apartments. So can anyone help me out with this, im actually just curious...