I don't know if there are any laws of specific gambling platform owners. But naturally the question that arises is why they are gambling? I don't think they have any motive for gambling as they are getting passive income from gambling platform. They are businessman, not gamblers. A gambler usually gambles for the sake of more money but those who are traders plan to increase their money not by gambling but by growing their business. If you think like a gambler then gambling is possible by them but if you think like a businessman then there is no scope to think like a gambler. I think there is no problem if someone is gambling.