I've read a lot of books on multiple different platforms and to be completely honest the whole harem/ reverse-harem trope is prominent only on WN. Don't get me wrong, some harem books are pleasant reads, but when they cross a line [like that mother and daughter sharing a husband] I drop the book. A lot of romance reads here are just pure smut and that's not something I enjoy. A good plotline with romance leading to smut? That's fine. But just plain old pleasuring isn't enjoyable [my opinion]
In short, what can we conclude? WN has a lot of horknee readers lol.