https://blockchain.info/address/13Df4x5nQo7boLWHxQCbJzobN5gUNT65Hh
So may be it's a cold storage (or big hot wallet) of RipDice
It has bee certified as a scam now though .
Well if they been certified as a scam then that is one heck of a lot of coin to get away with and some serious coin made their for the people behind the scam ie the admins and people working along side them.
I don't know much about it but RipDice is the name shown on their transaction ,i don't think they would have been able to get away with such large amount .
Definitely they hadn't cheated at that time maybe?
https://blockchain.info/address/13Df4x5nQo7boLWHxQCbJzobN5gUNT65Hh
So may be it's a cold storage (or big hot wallet) of RipDice
It has bee certified as a scam now though .
Double Deposit it's not that easy and wouldn't be accepted by Main blockchain or miners