As per an interview @ Anime News Network, Comics One stopped using ebooks due to low sales. They felt they were ahead of their time… would things be different now? If not, when will ebooks be a viable form of distribution?
ANN: Comics One when it started, was only releasing manga titles over the web using software from Adobe. Can you tell us what led to your company originally doing this and then moving away from it?
Nicole: We originally felt ebooks were the next big thing. They had many benefits: portable, easy distribution, no warehousing issues, cheap sales, price, etc… Unfortunately, after a few months of low sales, we knew we were ahead of our time and we began publishing hardcopy books. We now only use ebooks for promotional purposes.
Read more at Comics One Profile