There are a lot of people who, for whatever reason, cannot afford to purchase mangas and need online services like Mangastream so they can read the series they love. Sure, some people take advantage of the system and read for free when they could buy, but most people would buy the manga if the could. To add to that, Viz's online magazine, which is supposed to provide services similar to those of Mangastream for a price, is two or three issues behind the currently available manga and only has a couple of mangas. I doubt that online manga reading hurts Viz's prrofit margins in a way significant enough way to cause harm to them(unless, of course, you consider it harmful for them to be not quite as rich as they would like to be), so I will not standby and let them take Mangastream away, especially when MS has given them so many concessions already.