This is definitely a scam site. My guess is that the girls get paid a commission to up charge you. Example: They send you an email. You pay to read it and respond. They don't respond to your email. Instead they share their additional photos which you need to pay to see. But they never respond to the email.
Tip for consumers: There are real sites out there. This is not one of them.
* Secret Benefits attempted to help this customer through the Sitejabber Resolution Center, but the customer did not respond