I still feel they should extend the withdrawal time frame a bit longer. 15 days is a very short time for all customers to notice that the service is closing.
I totally agree with you, because 15 days is too little time for everyone who has something on their accounts to be able to make a withdraw. I think that this could have the greatest impact on those who are on vacation and will not receive information in time, which will surely result in many complaints later.
It is generally not a good idea to keep coin in a casino account when you are not actively gambling, or do not plan on immediately gambling the coin. There is little to no benefit to not withdrawing, and there is the risk that your account will get hacked, or the casino itselt will get hacked (or "hacked").