If you are really serious about taking your adult website to a whole other level, there's no need to reinvent the wheel.
Just copy what Pornhub did.
Pornhub is now the 800-lb gorilla of the online entertainment industry.
Very few come close.
How did it get there?
Simple.
Press releases!
Pornhub has access to user content consumption information.
It uses this aggregated info to detect porn consumer trends.
By issuing press releases that talk about such trends, many mainstream online news websites that normally wouldn't touch a porn site with a ten-foot pole started linking to them.
Pornhub would periodically issue press releases regarding racial patterns, ethnic patterns, religious patterns.
These are the kinds of things that the mainstream news media are interested in.
And that's why Pornhub gets a lot of backlinks from high-authority news websites, and this strategy has transformed Pornhub into a market leader.
You can do the same with sub-niches of adult content.