Scroll down for video. In a revealing peek into the billion dollar industry, documentary filmmakers exposed how professionally produced films are being made to look like home movies. It showed how Craigslist ads which promised free flights to Miami bring in a constant stream of would-be porn stars. During the film, Riley, a year-old 'agent' hosts half a dozen young women eager to enter the industry at his Miami home. But the brutal world of pornography only gives girls aged to 21 a career span that typically lasts just three months, due to high turnover.