Crypto casinos market themselves as no-KYC until they aren't. Here's what actually triggers ID checks, based on our Ledger observations.
Shuffle and Thrill stay truly no-KYC at default play volumes. Stake and Duelbits are triggered-by-volume: you can play anonymously, you can usually cash out once, but sustained activity attracts checks. BC.Game, Wild.io, Cloudbet and 1xBet apply KYC above clear thresholds published in their terms.
If you're privacy-oriented and expect to move real money, pick operators where KYC is triggered (not always required) and keep your profile low enough to stay under the radar. The Ledger will record any observed shift.