Just couple day after launch, J-comi already got 1.5 million download.
I owned the whole series of Love Hina Manga and Anime (currently still in the US). And I used to read this manga in Japanese. The manga was originally published from 1999-2002, and it's currently out-of-print.
The original author, Akamatsu Ken, decided to start his own website and offer the Love Hina series for free. I can see the PDF manga has some advertisement between the manga, but the manga is otherwise free. http://www.j-comi.jp/
I might just read the whole manga again.