In my own view, it's because there is no pressure from the government. No hard and strict regulations imposed. Different from how fiat gambling is regulated.
Definitely. Since they are online gambling, the government will be hard to control or give pressure to them. Moreover, some of them may be totally anonymous and don't know where they basically. So, in this case, who will force them to implement KYC/AML? While for exchanges, they are commonly known to register in a certain country. Then, it will be easy to handle them doing KYC/AML. (IMHO as an amateur) 