As they say...Sex sells.
You can't go wrong with fanservice, especially when there are plenty of anime and manga chock full of it. For some reason it all seems the same to me now. I think Love Hina pretty much paved the way for alot of the 'crap' that's been made these days. Now before you start flaming, I didn't say that ALL of harem sub-genre or ecchi is crap. At least there are some pretty decent ones, like Tenjou Tenge, Tenchi, or Ai Yori Aoshi, with good art, interesting story, and good character development.
As for the original post...sorry I can't help ya!
That's enough ramblin' for me.