The team of the casino may not be involved in such activity but there are some greedy staff in the company that can do that. We can give benefit of doubts to some reputable platform but you don't know so well what is going on behind the scene.
Staff members are part of team. But, based of the context of your reply, by "team" I suppose you are referring to the casino owners, right?
Hiring staff members is the owners' responsibility. So, if something goes wrong, the owners still bear part of the responsibility.
Besides, there should be some kind of restrictions on who can access sensitive data such as users' private information.
Unfortunately, not all casinos take their users' privacy seriously. I once witne3a case where the live chat agent asked the customer to upload his documents via the chat window!
It always must be the owners` responsibility. But it must be proved before. If the lost/sold your data, it must be proved. I don`t think that some private person can prove, that he shared his data only with one casino and soon he find it in the internet. And the stuff understand it.
But the same time - even federal services in my country sell your data, so i don`t see any way to save your data privacy.