I'm not quite sure which are you referring to:
https://leomonacocasino.com/ or
https://leonmonaco.com/since the other was not really trusted poor terms and condition and and without other features and the other one I think is the one you are referring to it seems that it's like a normal fiat casino but the thing is that I think they will be needing KYC once you registered which is not good for a unlicensed fiat casino.
Account must be activated through the Welcome email and KYC verified by uploading the following documents:
Coloured Photocopy/Picture of your ID card, Passport or Driver's License. We need to see your full name, D.O.B and Expiry Date;
Real-time photo ( "selfie" ) while holding the front and back sides of the document you chose, under your chin;
Coloured Photocopy/Picture/Screenshot of a recent Utility bill / Bank statement (no older than 3 months) showing the issue date, your name, address and the company logo;