Yeah, I don't know why GP even bothers with the "Editor's Office" forum any more. No one seems to have the time or interest to monitor it.
There's another post here with a member asking about a review for his product. Like you, he's had no response.
Like you say, at least log in and take a minute to say "no" and not leave a guy hanging. If that can't be done, then close the forum because it's not helping GP - it's just alienating users/readers.