At Betflexi.com, we don't ask for that as we believe that player's privacy supersedes every other consideration. Asking for source of wealth is never a sure way to curb money laundering. There are far better and more sophisticated ways.
Are you among the devs team when using the word "we" signifies that you are also among the casino operator, however, I wouldn't want to capitalize your statement but it's deem necessary for a casino and gambling site to asked about additional verification or source of wealth if they the money isn't coming from the right source, this is to fight against anti money laundering.
He is the representative of Betflexi.com casino, I assume they do not have a license because I do not understand how even with a license they are not asking for KYC. In any case, they are a new casino so people should be very careful when dealing with this casino. Do not put too much money
Run away. There are too many casinos that won't ask you to do that, which looks like a scam. In a bank it's reasonable, but not in a casino.
The problem is that I have money to withdraw
The solution is simple: do KYC.
How did you get money to deposit and play at the casino? You just need to explain to the casino how you got the money to deposit at the casino and then show proof. If it is money coming from your bank account, then take a picture of the transaction and show it to the casino. If you are mining, also say that you are mining and ask how you can show proof and the casino will give you instructions.