hook_link code?

Is there a specific reason this module doesn't have a hook_link? I've added a small block to show the members link in the primary links section. The code was mirrored from the forum.module.

function members_link($type, $node = 0, $main = 0) {
  global $user;

  $links = array();

  if ($type == 'page' && user_access('access members list')) {
    $links[] = l(t('members'), 'members');
  }

  return $links;
}