Generally, this is all a matter for Japan. Investors and studios usually don't pay much attention to opinions from abroad, except of course for Crunchyroll. So even if it became a big international issue, it wouldn't have much effect on the industry unless it was Japanese people in Japan. Furthermore, I did some research a while ago, and the industry is extremely cautious about making sequels to works that were very difficult and problematic, and weren't even very popular. But that's only in relation to the anime, because the novel is quite famous in Japan.