Around the internet I have seen anonymous groups of people, specially on Imageboards who have managed to identify potential criminals and people doing bad deeds only using as resource some pictures taken by the suspect himself and other digital leftover data, meta data of the pictures, etc.
The longest a casino operates and the biggest volume it has, it becomes increasingly difficult for their owners to stay in the shadows. I bet there are enough on-chain transaccions from and out Betnomi to link some wallets to exchange addresses and therefore, someone's identity. Even though I am in for privacy, I am not a supporter of taking other's money this way.
Betnomi also launch their giveaway with Ledger through raffle here in the forum. They ship personally the package to all the winners. The identity and address of the sender of the prize might be use as a clue to find the real owner because surely that person is working for Betnomi and has an information that will lead to the owner identity.