Here's a link to an article someone posted on another forum site with some related information on these kinds of videos that you guys may find interesting. It should be noted that the article is over a year old.
http://iiiii.com/webnews/voynews/m/1674.html
In short, the article says that women can make a ton of money by filming the other women and selling the footage to adult video companies.
I hope it's okay to post a link to another forum website. If it's not, I apologize. It's just that I couldn't find the original article.