Company is owned and run by state and I doubt they would allow themselves to have any shenanigans with their customers. You can always sue them, you can sue private companies too but private ownership is just an extra worry. That's why I also have a bank account at the state owned bank not the private one.

That’s probably a good intuition and definitely smart about the bank — I was dropped by Commerzbank in Germany without explanation — but if I were so good at betting that I worried about a ban, I’d want to double check the actual rules.

I mean state is probably the better custodian of your money and your interests than the private investors unless you live in a rogue state run by criminals.

Leaving aside the question of whether it has to be a rogue state to be run by criminals, I think that operating a gambling syndicate is never in the interest of the citizenry, and that includes the Lottery, which is functionally a tax on the poor. For very gaudy spectacles of that exploitation, turn on the TV at Christmas in Spain.