could Gringotts be empty just because a lot of people don't know it is open? (After all it was never advertised it would be opened)
I do remember passing by that area and there was a group of about 10 people and one of them kept telling everyone else to go check Diagon and everyone else said it was closed. (They eventually went in I think)
But then also, some family from out of town came to HHN and they had no idea it was opened until I mentioned it to them.
if it was announced on the website, do you think more people would go in there? Because, besides seeing people going into that area, there is no way to tell it is actually open