No reputable casino would want to sell customer details to scammers. First, such an act is going to tarnish their image; second, they will lose a lot of customers; and third, they're already making lots of money and therefore would not just sell off customer details for some cheap offer. The thing is that it is only a non-reputable casino that can trade customer details for extra profit, and that is why it is necessary to always make a choice for a good casino.
For the majority of us, that is what we think. I know it's crazy but I think anomalies can also happen secretly on them, so it's better to not be confident at all times and defend them because they might only laugh at us in the background.
Yes, they are already making lots of money but you know, money-making can also be addicting and I don't think they will only get and accept cheap offers. They aren't still dumb enough to trade their reputation to it. They are only unlucky once someone finds it out and show a solid proof to the public or to the authorities. This is when the first and second thing that you said or so-called consequences can come.