i looked into this a little bit and it would seem the gambling guys who ask for KYC for large payments are basically going from this, as most are based in Europe:
"The new directive does not completely change those requirements; however it differentiates the transaction threshold. For transfers of funds according to article 3 (9) regulation (EU) 2015/847, the threshold is set to € 1,000, including credit transfers, direct debit transactions as well cross-border transactions “carried out using a payment card, an electronic money instrument, or a mobile phone, or any other digital or IT prepaid or postpaid device”. A threshold of € 10,000 applies for persons “trading in goods, when carrying out occasional transactions” in cash and finally the specific threshold of € 2,000 “applies for providers of gambling services, upon the collection of winnings, the wagering of a stake, or both”https://www.bankinghub.eu/banking/finance-risk/finalization-4th-anti-money-laundering-directiveThey are pretty much doing half KYC in regards to knowing who is winning big based upon that EU directive.
As Curacao is technically an associate member of the European Community, with most crypto-casino's holding a Curacao license, all Curacao businesses come under the European fiscal rules with the Supreme Court of the Netherlands presiding over any final judgements with Curacao and financial conduct. As a consequence Curacao must uphold KYC using the framework adhered to it by the EU such as:
FATF/OECD compliant
EU-compliant
AML compliant
The European Commission advised that all European cryptocurrency exchanges will become obliged entities under the 4th AntiMoney Laundering Directive recently. That directive says that to use a financial transactions service any users must pass KYC first which includes: ”Evidence of identity that can take a number of forms. In respect of individuals, much weight is placed on so-called ‘identity documents’, such as passports and photocard driving licences, and these are often the easiest way of being reasonably satisfied as to someone’s identity." Therefore any one using a Curacao license is also obliged to collect KYC according to the EU 4th AML directive.
In conclusion, if you are not being asked for specific documents to verify your identity before you are allowed to deposit crypto into a casino with a Curacao license then the casino in question is in breach of its Curacao license and EU law. You can actually then take any claims against a casino to a Curacao court of law and you can probably sue the Curacao gaming licensing agency also because they are not properly adhering to EU 4th AML directive also, which the Supreme Court of Nederlands has ultimate jurisdiction over.
Everyone should know their rights when dealing with gambling companies and all these companies are breaking the law if they are a) based in Europe as an entity or b) hold a Curacao license.
Example: coingaming group (bitcasino.io / sportsbet.io) is based in the EU (Estonia) with a Curacao license and does not undertake KYC as based upon the 4th AML directive (aka not verifying the identity of an individual before a financial deposit) so is therefore is breaking the law. Mention all these points above to any operator if they claim KYC and see what they come back with.