I think casinos are starting to adopt KYC as a way of protecting their site from illegal activities or investment. Since government saw the opportunity of using cryptos to hide money from corruption, sooner they will implement requiring of records from different exchanges as well as gambling site to prevent illegal activities. I also see that sooner full adoption of digital currency will take place so government needs to put some regulations for it.
What do you mean adopting to protect from illegal activities?
You are surely not aware but most of the bitcoin gambling sites are illegal , they don't pay any amount of tax from their profit why do you think all these dice sites have such low house edge because they are not answerable to the regulators , kyc is simply an excuse for not sending payments