How did it take them a week, when it took HitBTC a day to get this setup? Why did they delay deposits for so long as they were planning the bcash split for a long term beforehand? Did they not plan to have deposit/withdrawal support until recently?
They waited until they thought the chain was secure enough to not risk it's customer's money. They clearly said that on their twitter.
ViaBTC had to halt withdrawals just a few days ago just because of that. The chain is still not very secure, use on your own risk they say in the blog.