DEvils have not sucked until right just now and have never had great attendance. Just like the nets so it goes to show New jersey
is a poor market when it comes to attendance. The Islanders have had crappy support for years and years. One would have to go back a long time to when they were considered a successful franchise from a business point of view. the Rangers have also been a pretty shitty team, but their support has been strong throughout - like the Knicks because NY proper is a good market for those sports and it always has been.
I don't think it's as much based on winning and losing as you imply.