I have to say if you asked me, I would probably just say why, are you auditioning to be my financial advisor? And then tell you to stfu
Did you mother not teach you it's never polite to ask people about their finances?
What the casino can see is all your lines of credit with other casinos. There is a central database for that. They can see how you pay back your markers. That's often how out of the blue you'll get offers for a casino you've never been to.
When you apply for a line of credit, they check your credit. So now they know more about you. But only what's on Experian or whatever agency they use.
In effect, they don't know your disposable income, only how you use credit.
The Amex Centurion card is meant for the 1%'s. Unless you spend a min of 250k a year on amex for more than a few years, if you're not a celebrity, have a salary of 1+million, and have a credit score in the high 800's you will never get an invitation.
I don't think the people playing minimum (your description) at Carnival's poker tables are going to be in that 1%....lol
So I find your insight....hilarious.