If C-CEX happened to accidentally loose their DIG wallet, that would mean that they lost their whole ETH-wallet, including numerous other tokens running on it. I hope that doesn't happen.
DIG balance is fine. It sits on our ETH address. The problem is DIG is not sending it's tokens. When we enabled it initially we got lot's of failed withdrawals like:
We serve over 40 other ERC20 tokens here and all of them works fine. It's something with DIG contract and we informed DIG owner instantly after we saw this issue. By now it is not resolved. You can also see a lot of failed recent transfers: https://etherscan.io/address/0x093e5c256ff8b32c7f1377f4c20e331674c77f00