When swisscex closed it emailed private keys holding each customers funds to the email address each customer registered with. Swisscex did that automatically without forcing each customer to request it. Will you do the same for customers who miss your deadline that you gave very short notice of?
AllCoin.com went offline months ago and I had given up hope of getting my coins back. Very few customers will read this section, or notice this thread in time.
If you really are the owner of the allcoin exchange why didn't you post with the bitcointalk user name allcoin.com?
This is the allcoin.com bitcointalk profile, and that account announced the exchange's opening.
https://bitcointalk.org/index.php?action=profile;u=236735