It's doubly worse at a porn company. People already half-expect you to be scamming them somehow, and come into it with apprehension if not outright hostility.
The upshot is when you give them amazing customer service, they turn into instant evangelists :)
Oh definitely, most people don't go around talking about paying for porn sites, but the really hardcore porn customers (the kind who regularly pay for porn) can be extremely loyal if you treat them nicely (and vocal if you don't).
I used to be a development manager at Naughty America, but now I'm doing consulting and development for Dirty Hot Productions (and also helping out with customer service, since it just launched and the volume is still low).
I kind of wanted to avoid being "typecast" as an adult developer (I do have non-adult clients as well), but the owner of Dirty Hot Productions used to be a fellow employee at NA, has funding, and I really enjoy building products from scratch so it was hard to pass up.
The upshot is when you give them amazing customer service, they turn into instant evangelists :)