Link the professional site on your bio, but not the hub. People make too big of a deal about this stuff. Believe me, you really deal with editors in print. These guys aren't half bad. Personally, I think the moderator is off the hook. Let me break it down. They are pretty cool. Just go with the flow and keep a tight ship.
Bottom line. You can't have a link, but you can have a reference in text or an image. Take a hint. If it is good, they will take the extra step to get there. Don't be stubborn and have fun.