Miss-quoted probably. whatever, to stuff above!
Maybe just NTR is becoming "not so" niche anymore?
Maybe the interest has been there for quite some time, but with Japanese putting a name to the word, NTR it has begun to flourish, and in reality, quite a lot find it interesting and nice.
I can only speculate, but I think that is part of it.
AI being a thing? Maybe people who enjoy NTR are more story based tellers?? and not as creative in drawing etc? So when AI came, they could make their games and ideas more easily.
I mean,I have no clue, but I do think NTR is and has grown ever since the word came to be.
I am one that enjoys NTR, but, each to their own.