Also you're fighting to sell a membership at sitea.com when some torrent or pirating site offers full rips of sitea.com within the top 10 results on Google for that search.
So basically you're trying to sell a $5 cup of coffee to a guy while someone next to you is giving away that same coffee for free + a bagel.
Unless you're targetting working for a major company (Brazzers who owns PornHub, Tube8, KeezMovies, Extremetube, etc) you've gotta have some serious skills, otherwise you have to create your own site... Not many in the realm of porn actually have full companies behind them, most of them are just your average joe running a site by himself.
Not to mention most porn website owners are cheap... Doing any type of work in that realm is a pain.
Believe me... The idea of being paid to watch porn wears off after the first 3 months... After that it screws with you...
One of the big things is, normally you see a hot girl and you're wondering how she's in bed... After working in porn for a year plus, you're wondering how much you could make off selling her on your site.
Like companies in every industry, some porn companies are sleazy and some are not. On average, it probably compares favorably to investment banking and the domain name industry.
So basically you're trying to sell a $5 cup of coffee to a guy while someone next to you is giving away that same coffee for free + a bagel.