The old cold storage is used because we want to demonstrate that the accounts and cold storage remain uncompromised.
That seems like a worst of all worlds approach. If something happens to the cold storage, it won't be possible to know who was at fault. I can't imagine why either the new or old owners would agree to that.
I think the keys to the cold storage address has been transferred to the new owner that is why they do not feel any fear of something happen to the funds stored to the address. By the way it is a big risk from them. Anyway now we hope they will continue their journey and will start to create the name as it was before with their new brand.