Siliconera writes: "Former DC vice president of sales and co-publisher at Yen Press, Rich Johnson, recently wrote at length on the subject of the manga decline over the past three years. In his article, he attempts to discuss just what caused the manga sector to spiral downward the way it did, where American comics and graphic novels still managed to hold their own."
It's simple. Scalation. I'm sure people have seen that a Manga Scalation site is one of the top 1000 sites on the whole internet.
For whatever reason Manga and anime fans feel they are entitled to something regardless if it's been released in their region or if they have the money to pay for it or not. It's what is killing the Manga industry and it's killing the anime industry as well.
It's not a problem for the comic industry because by and large comic fans BUY what they read and as such support the industry. In addition to that companies like Marvel and DC diversify quite a bit with cartoons, Toys and movies that make them millions upon millions.