The knights are not the only ones to have lost supporters. Looking at the titans their crowds are down as well notwithstanding they have got one of the best stadiums, a good footy team, stars like Prince/Campbell/Bailey/Laffranchi, a successful NYC team, huge press coverage, good transport systems, entry costs the similar to last year.
My view is that it really comes down to the economy, needing to tighten belts, employment uncertainty. I also think that this belt tightening ties in with Foxtel which offers 20 live games a month for the family as well as 8 NYC games for the price of a bit over 1 adult ticket to a single game.