Not sure its reasonable to expect a constant demand of 1500 more each day. We might get some buying on Friday as it will be payday for a big % of people, but other than that yesterday should have been the big day for remaining sales as its gone to general sale (with previous purchase history), and today they could buy an extra 2 each. If we've still got 15k to shift, I'd be surprised if we manage to sell another 5k of them at this stage. I'll happily be proven wrong.
I really couldn't care less if I was there on my own surrounded by empty seats (sometimes I'd prefer it!), but I know some supporters get hung up on it. If Liverpool or United fans ask about it its a simple response - "how many have you sold?". None. Zero. Zilch. Fuck all.