Let's say you are starting a legitimate pr0n business (though this works for other types) you are going to set it up correctly as you would have no reason not to, then off you go to get content, you find some distributors who sell you content but what you don't know is that they don't hold the rights. That's where the IP lawyers come in and sue your ass. There's also people that set up their own website and add content without realising your not allowed to. There's probably other examples but the IP lawyers will be very upset they have lost this resource.