I think you are all misreading the article!
It says 'Over the years, Mumsnet has built up an identifiable community, with a retinue of tribal elders and a mechanism that can swing into formidable and effective action should any member need help.' and then separately lists out 4 regular posters.
The retinue of tribal elders in unspecified. Without a shadow of a doubt, had CM named them, they would have included the following posters:
Blu
Marina
Batters
Bundle
Prufrock
Custardo
WWW
PPH
Bran
Frogs
Kewcumeber
Mea rs
Twiglet
Roisin
MartianBishop
Dinosaur
Cod (yes, really!)
Anorak
Freckle
Yurt
Tamum
Tiktok
Soupdragon
and many other posters whose names have momentarily escaped me.
These 'elders' may not be the mosts regular or prolific posters, but when the chips are down and you need wise counsel, by God do you hope they turn up and post!
They keep this place the community that it is, not because they like a quick laugh here and there, but because they care about this place, the ethos of it, and the important resource that it provides. They are the continuum, if you like. Bridging the various generations of posters with good solid care and maintenance
So perhaps the elders too would like to take a bow