Here it is clear that 2 casinos use the same wallet and the same company address it means that they are interconnected, either through third parties or other services. The most sensitive part in any company is funds so it doesn't make sense to me when the wallet can be controlled by a third party.
I don't know much about casino business set up, but I have seen such cases before. A good example is the scam chain of casinos owned by 1x corp NV that share some deposit address. It probably means both casinos could be owned by one company.
Maybe the sharing of deposit addresses is done for auditing or accounting reasons.