We can't sign the address, yet there are confirmations of dozens of thousands of dollars being paid out, not only as a refund, but as won funds too (even on this forum).
So far only in the contests we raffled out about $5000. The sum of signature campaigns is already above $100 000.
I'm afraid we can't show more information, but there are a lot of circumstantial evidence.
From what I can see, these contests were held off-site, so they cannot be considered proof that the casino pays winnings to regular players on the platform. I specifically asked about transactions from your gambling platform. And please don't imply that such information would violate player privacy, since all transactions are public information on the blockchain anyway. I am not asking you to post user accounts associated with transactions.
When you say "we can't sign the address", does that mean you're not really in control of that wallet? In that case, who makes the payments?