The only way it wouldn't be a failure is if SISU were to go because of it...
A couple of points:
Firstly, while I'd be delighted if SISU decided to depart, I think that the primary aim of NOPM is pretty generally agreed to be to get us playing back in Coventry, so if that were to happen, I'd certainly consider that to be a success.
The more general point though, was to question the rather sneering attitude that a number of posters take to NOPM (not picking on you here), seemingly attempting to find examples that they believe show some form of inconsistency in approach, so that they can then metaphorically wave them above their heads in a show of triumph.
NOPM is not a political party (not that they are generally of one mind), neither is it an organisation where the members have all signed up to a set of rules that they have sworn an oath to uphold.
Rather it is an attempt to show disgust (my word, not everyone's) at the actions of SISU in moving our club out of its city and to express that disgust by attempting to withhold as much revenue as possible from them.
If someone used to buy 4 season tickets for the Ricoh and now doesn't go to Sixfields, I don't believe that their action (or NOPM in general) would be undermined if their child desperately wanted a Coventry shirt for his/her birthday and they decided to buy it for them.
Mr Fisher said in the forums that he expected between 3k and 6k at Sixfields, the latter if things were going well. At the moment we have early season optimism, good weather and a team that has scored 9 goals in the last 2 games. Had you put that scenario to Mr Fisher back in July, I think it's a pretty safe bet that he'd have expected approaching a full house at the weekend.
We'll have to wait to see what happens on Sunday, but if the attendance is still around the 2k mark, I cannot believe that that will have no impact on SISU as that would extrapolate to a seven figure revenue loss over the season against expectations. To be clear, I don't believe that this will lead to an instant decision to throw the towel in, but I do believe that it will start to influence their thinking and their view about what they may (or may not) be able to achieve over the longer term.