I can second that: complete waste of time. I've had some experience with the HLP in the past regarding various gaming projects, and I can tell you first-hand that it's not an organization set up to deal with the public. Like ever.
Chigger's description seems essentially correct to me. Brian is the public face of the HLP (I'll skip the too-easy jokes), Byron is the semi-public figure who got stuck with dealing with (very poorly) the masses at the forums, and KJA is the hired gun who, by all appearances, now seems to actually run the organization. He's either slimed his way up the ladder over the years or else the HLP basically wants him to run things ... sadly, the latter wouldn't surprise me too much.
Everyone else? Utterly useless. It's completely obvious that the HLP's real role is to serve as a legal entity to control the flow of who gets what royalty checks when Kevvie hikes out another episode. That's it. Other than the obvious media of books and movies, all other brand-related questions are answered with a "no"; any effort at contact by individual fans or groups of fans is stopped at the door with a wall of silence. (Dune is actually one of the most poorly-branded franchises in the history of marketing, and the fault is entirely the HLP's ... but that's probably worth a separate discussion of its own).
Anyway, back to the point: waste of time. There's a big stone wall around the HLP; banging your head against it won't prove or solve anything.
"Anything I write will be remembered and listed in bibliographies on Dune for several hundred years ..." — some delusional halfwit troll.