I think most message forums are like that. Mine, for instance has at any given time over 1000 members, but around 50 post on a continual basis. People move, some join and forget they joined, some find help elsewhere, their pcs crash and burn. It can be any number of things.

Blessings,
Barb~

[i]"The artist, a traveler on this earth, leaves behind imperishable traces of his being." -Fran