First thing I saw when visiting their website was a request to comply with KYC... This casino has very little online presence so it's hard to trust someone asking for your full name and address while not even proving they're registered as a company. Nowhere in their landing page did I see any company registration information or anything as such. Even their domain was registered very recently and is under the name of some obscure privacy provider:
https://who.is/whois/leonmonaco.comI wouldn't trust this casino unless they did more to work with the community at first.
Asking out full name and address without any corresponding documents wont really be that much of a problem and when they do then thats the time we can say that it do sucks.
Its just normal for the community not to trust up easily on a newly or non popular site when they do pop-out and of course, hesitance would really be there since you wouldnt know if theyre fair
or they do really pay winnings.
I see that this is a fiat based casino so it wont be surprising if they would really ask out some personal verification which everyone do hate about.