Check out this thread -
https://bitcointalk.org/index.php?topic=717790.0It contains a list of casinos with info on whether they request for kyc or not, you can also read their terms for the exact amount that triggers the requirement to submit documents.
You won't have trouble with kyc on most casinos here on the forum if you're withdrawing below $2,000 to $3,000, but always do your research before depositing and bear in mind that casinos always reserve the rights to request for kyc at any time.
Try go through the site lists again, there are some gambling sites on this forum that are not listed. I can mention three that I know of right now. I hope the OP of the thread will edit the thread. I did not see Metawin also.
To be honest I have been using this platform stake.com for a long time without any KYC verification.
Are you sure about this? Stake require KYC is all that I know. I am using the gambling site also and I have no problem using the site but it did requested for KYC when I registered.