I think people should remember that because this was a adaptation it was hard to survive when the LN ended, especially when the LN had such a ending.
Manga and anime are simply advertisements for the LN, most adaptations dont survive 15 volumes, in some cases they cover the whole LN but that is only when the series is popular enough and by the looks of things, Shomin Sample own ending certainly didnt help and as for Masamune Revenge ... its kinda odd they mentioned it since its over but then again, so did Kaichou (and I know who won in that one to no surprise) but it was in relation to sales, Masamune Revenge apparently sold well (that I found odd since I wasnt fond of how development was handled) and I doubt it had a impact on Shomin Sample ending and it certainly didnt on the LN ending.