Transcript for 'Hot Girls Wanted': A Shocking Look at How Teen Girls End Up in Amateur Porn

Thank you for joining us. The glitter allure of fame and fortune. One teenager clicked on an ad that simply said hot girls wanted but found herself like countless other young women inside of what he she says was a dark, sinister world of porn. Here's ABC's Rebecca Jarvis. Reporter: At first glance it may look like a slumber party. In reality it is a sorority of a different kind. You guys are teeny boppers. You get the young shoots because you are really young looking. Reporter: They are among the thousands naive, fresh faced 18 to 20-year-olds plucked from small towns at the click of a mouse. Free flight to Miami. That will grab attention. Reporter: To come to Miami to take part in a new growing part of the porn industry. I locked everything in my car. Reporter: So-called amateur porn. Amateur porn world. You are just processed meat. Reporter: Girls like Carly brought up in a generation that porn seems to be everywhere. People on porn having sex and nothing going wrong and everybody's happy. It's really confusing. Reporter: And this girl who is worried her family in a small town may find out what she is doing. I have this weird feeling my mom knows. Reporter: Rachel seems like your typical girl next door from rural, Illinois. Not long ago you could catch her playing the clarinet in the high school band, a self described nerd from a religious family. I was like an introvert. I wasn't popular. Reporter: Youthful, innocent, naive, just what porn consumers apparently crave. I had sex with two people before I went and did porn. Reporter: According to the Kenzie institute, one of the few research institutes that study the adult film industry, teen is the most searched word on porn sites. A lot of them look like the girl next door. All of these sites that say watch real girls, like real 18-year-olds get naked for the first time. A lot of that is in fact what is happening. It is all about the guy getting off. Reporter: In their new documentary "Hot girls wanted" film makers spent months following Rachel and other teen girls capturing the risks and harsh realities of amateur porn work. There's an influx of girls trying to do porn. A lot of them know it's a trap but the money in their face right now, cash. They take it and hope for the best. Reporter: The allure for some money for college, but for just about every girl a chance at fame. I just wanted to be famous. Famous like Julia Roberts famous? No, like Kim Kardashian famous. Reporter: The hunt for these unsuspecting girls is alarmingly simple. It begins with a craigslist post, hot girls wanted, a modeling job you get paid and free airfare. They e-mailed me and said it was adult entertainment. You can get 2,000, $3,000 for going there once. I thought I was going to go there and do one or two and come back. Reporter: For Rachel it was a way out fast. I'm sure there were other options but they weren't quick enough options. Reporter: It is Rachel's first plane ride ever and landed her in Miami in a life she hadn't imagined. I'm like oh, god, I'm actually doing this. Are you kidding me? What's going on? I was in the backseat and someone was driving the car. He says he has been doing this three years but unlike other agents said he actually cares about his girls. He didn't give you time to think it through. No. I think that was a good strategy for him because if I would have had time to think it through I probably wouldn't have gone. It looks innocent and all. Reporter: She chooses a porn name ava Taylor and takes the irreversible step on a website called reality kings.com going in to the first time that was going through your head? Too much. I was freaking out. Ava. That's it. What's up ava? Nothing, just chillin'. Reporter: He starts to make $1,000 a shoot. At first reveling in her newfound freedom. I have done so much here. Penthouse, lamborghinis, did all the I ever wanted to do. I'm trying to be famous. You have to do what you have to do. Reporter: The money comes at a price. The girls pay for rent, lingerie and makeup. Most girls shelf life is a few months. Rachel lasted six. Making 85 videos, raking in $80,000 but she said she went home with just $2,000. It's not like you are actually making $80,000. You are really just surviving. What does the agent take? 15%. Reporter: Also the physical toll. It is horrible because no one is meant to have sex that long or that vigorously, or you know, that intensely for that many days in a row and with different people. A lot of porn is like that. You are like this is so just work right now. Watching it from this point of view now, I can just tell that I really didn't want to be there. I was like mad during this. I can see it on my face. Reporter: The real winners, the porn sites, which get more traffic each month than netflix, Amazon and Twitter combined. The top three pro-am chur sites are now worth an estimated $50 million. These banner ads just pop up for these websites called 18 and abused. They are saying come to our site so you can watch us. You know -- Reporter: Harm somebody. Right. Reporter: New dpirls are often paid to do abuse porn which gets 60 million hits a month. It shows girls performing obscene acts that can cause them to vomit or bleed. It's horrific. Somehow it's legal. A lot of young girls do end up doing that as their first scene. Reporter: The only federal regulation is that porn actors be 18. Rachel never told her parents, but they found out. I knew I couldn't come back here. I'm just a burned out porn star and I'm like that can't happen. I'm just going to have to do this until I find something else to do. And then I kind of did. I found my camera and that saved my life. Because I had nothing. I had nothing to live for. It was really sad. I seriously thought I had no talents but taking off my clothes and having sex with people. Reporter: Rachel quit, moved home and now works behind her camera. It's like I can be proud of every single thing that I do when it is behind my camera, not in front of someone else's. Reporter: Sae she says ava Taylor is gone. She will now only respond to Rachel. Would you ever go back? No. Reporter: You are certain. No. No. I'm 100% certain was a because there is no worse feeling than being used. When I went in I felt like I was 12 years old and now I feel like I'm 30 because it made me grow and understand myself. Reporter: For "Nightline," I'm Rebecca Jarvis in oswego. The government tri is hot girls want and available on netflix.

This transcript has been automatically generated and may not be 100% accurate.