Perhaps due to the lack of updates and feedback during the week?
I asked several questions in my post above, and none of them were answered.
Also did you post a warning yesterday that the deadline was approaching?
Did you PM all the people that signed up to let them know a race was organised? If they're only subscribed to the Signup/Interest thread, and haven't revisited the Long Race Series forum, then there's no way they'd've known there's a race on.
I'm not criticising here, just making suggestions based on the way some of the other events here are organised. The organiser is generally quite active in clarifying rules and regulations throughout the week, or whatever duration the race deadline extends to and making sure that the people that have indicated an interest in participating are notified of a race in progress.
Anyway, I'll get my full replay posted later for verification, I'm just over an hour into another running of the Nurb' 4hr Endurance so it'll have to wait until I'm done with that.
I guess I'm first in line for an HP penalty though.

When's the first race going up? I'm really looking forward to wringing the neck of that little MX-5 again!!!!