That niche diversity is probably their way forwards. It's hard to compete with a generic free product on RedTube or whatever (unless you literally have a girl who's a 10.0), so you've got to compete on something else. If putting her in a cheerleader's costume or dying her hair green makes her more attractive to your audience, it increases your odds of getting a sale with someone who's otherwise only a 7.0-8.0 and competing against a 6.0-7.0 on RedTube.