I never hear rules like that. That is seem crazy.
But we know gambling company get money from your gambling not for saving your money.
So... that is fair.. if they giving us atleast information about it when our account going dormant account.
Email the customer is enough. Let them withdraw remaining money..
If they taking action by itself, that is not different like ponzi scheme and that is hurt for the customer itself.
Gambling making a consistent bet in gambling is what gives gambling website more money and it's obvious, but having a dormant account in gambling is something that is different from my perspective,
As I may seeing dormant account in any gambling platforms, it doesn't grant any thing or bring anything at home, that is why i strongly believe that gambling get more money once people play more bet in it.
It's a win-win situation for the casino, here's I will show it:
1. If you leave your coins on the casino and didn't gamble at all, the casino will charge you some fees due to your inactivity (casino earn profit).
2. If you remember you have money on the casino and you want to withdraw it to your wallet, the casino will charge some fees when you want to withdraw your coins (casino earn profit).
3. If you remember you have money on the casino and you're want to gamble it all, since the house always win you will lose all of your money (again, casino earn profit).
In the end casino will make money, while you will lose your money. That's why you shouldn't gamble to chase more money.