Regulated casino licensing and unregulated gambling sites
https://lima-wiki.win/index.php/Regulated_casino_licensing_and_unregulated_gambling_sites
You've got regulated casino licensing, where governments issue permits and enforce rules on things like game fairness and age limits. Then there's the wild west of unregulated gambling sites, operating outside any official oversight, which can mean less protection if things go wrong or a payout gets disputed.