Interestingly, today, after the discussion on this topic here yesterday, there was an article at the Sportschau that was prepared by SWR and that was why the Allianz MTV Stuttgart was mentioned in particular.
Link: Geschrumpfte Liga: "Eine ganz gefährliche Entwicklung für uns"
But if you permanently lose in the Bundesliga, like Neuwied for example, there is no point in playing in the Bundesliga for any club. The spectators also lose interest at some point when the team loses every game 0-3.
Neuwied had 185 spectators against Suhl. Even after a few years there is no development to be seen in Neuwied.