There are other ARRL representatives on the list, just by the time I receive and read the messages Ria typically has already responded.
As for not having very many ARRL representatives here I have to put part of the blame on whoever started the list. I can't speak for others but I never received an invite to join the list when I became a director. Nor was I made aware the purpose of the list is to have an exchange with HQ which would have given me reason to join. It was some time after becoming a director that I learned of this and joined the list.
But then it is pretty easy to start a list, claim to have contact with a group of individuals that most likely were not invited and then accuse them of various things.
Dakota Division Director