I remembered an alternative option to handle something like that.
Make an alt site called either Mangasex, Mangadex After Dark or something else to host the NSFW content while being connected to the main site. It's only accessible with a Mangadex Account with a certain amount of use and activity and hidden from search engines with a 403 forbidden, there is also no direct link from the main site or on the forum.
All non-advertiser friendly stuff goes there, and the main site stays clean and pristine like the devs seemingly want.
It's a proven solution that sadpanda took and people are fine with that
MANGASEX 😭😭😭
This happened because NC failed (and is always destined to fail) in reaching big audience numbers. That has always been MD's game -- MD has better reading view, better user experience overall, and a more established ORGANIC base. NC had endlessly-promoted teenage-self-healing-projects and curiously underpromoted actual gems and a clunkier UX. They ended up burning cash for easily-gamed monthly contests for stuff that were uploaded to their site solely for the sake of winning those contests. No retention because retention is organic and their definition of organic is fluffy-yet-passive-aggressive "community" on Discord and whatever the hell their Social tab was. So they decided to monetize MD too. Hence the "illegal" content hunt. That was exactly what one of NC's founders told me -- spicy cover arts might make their apps flagged or whatever. Toni, what's up, big dog?
To the friends-and-holding-in-UK: NC wouldn't have failed if you guys had promoted the better titles in there instead of doing whatever the fuck it was you guys did, but I've outgrown talking to walls, so who cares. It's been three years, I'm just glad there has come an actual proper time to finally vent.