for a gambling there is international law itself that is defined, of course may be supposed for an online gambling will have its own laws, there may be other members who know?
You really ask very different question. I think we can not explain it. Sorry dear !
I also have no any idea. Sorry dear for not helping to provide any detail and information. Let wait for someone’s other useful and informative answer.
May be they observe the activities of online casinos and according to some rules and regulations they rank .