Background about the rugpull: https://web3isgoinggreat.com/?id=2022-02-11-3
edit: I can't find their specific Christmas Lana, but this is the one she linked in her minting announcement: (sfw-ish, bad cartoon in lingerie) https://pbs.twimg.com/media/FHepskOWUAEf6Fi?format=jpg&name=large
You can absolutely get good at gambling. The idea for casinos and such is to make make sure that enough people are not good at it to keep the house making money.
Also you can just ban them lol