When I got my job in the porn industry they didn't advertise that was what it was for. Instead it was brought up during the interview process.
They asked me a series of questions related to it as well. Like "For your day job you may have to visit bigblackcocks.com to make sure their website is functioning again, how do you feel about that?" and "We host a lot of content that might be offensive, if given root access would feel the urge to delete everything because it didn't fit in with your world view?"
I'm not offended at anything, so it really didn't bother me. I worked on many different aspects of the business. Massively scaling MySQL, handling DDoS attacks, setting up load balancers on the fly, helping figure out how certain websites were attacked and or compromised. It was a fun job, and one of the sites I worked on currently has 600+ live models streaming to over 1 million unique IP addresses.
I don't know how you'd go about finding such a job, I stumbled upon it. No, it is not on my resume since I am a software engineer at heart and not a sys admin, but the knowledge I have gained has allowed me to engineer various different systems in the mean time.
CCBill and Cave Creek located in Phoenix are two of the places where I interviewed before landing the other job, later I found out through a friend who did get the job at Cave Creek that he was doing the same stuff I was doing.