It is not unique what they do as Betfury was the first to launch this but it is an interesting approach. Some other sites have their own tokens but combining gambling and investing will always appeal to even more players. I have some OWL tokens but I don't play with them, just stake them and I am sure they will launch a new pool before the old one expires.
Well, was betfury was the first to launch this? I am not sure. And how many gambling sites have these features?
One thing is for sure this trend is not so common yet as most of the gambling sites do not possess their own token.