Kyc is not a big deal for a reputable and trusted casino site. stake.com is a good world ranked casino site so i think users will not take this as a issues.
And kyc is soo easy here you just have to fill your Name address and date of birth and upload both side selected document image. you do not have any hassse to take a picture with documents or face scam. this is very simple kyc. so i don't think any stake regular gamblers will leave this site for this.
It's not a matter of easy or difficult. I have also completed my Stake account KYC. It's very easy to complete. But you certainly know some people may be very sensitive to such things, not only related to casinos but also exchanges and others.
Some users may also take advantage of Stake as long as they don't enforce KYC for a long time. Maybe related to ownership of several accounts or others.
For those of us who are still enjoying the game at Stake and don't feel any problems with KYC that we can easily complete of course nothing will happen. Even users also get bonuses for KYC, we can spend it to continue the game.