This is a new promotion for their clubhouse feature. Wouldn't have seen it if you hadn't pointed it out. 
According to the specific guideline:
The raffle will take place on the OneTouch Bombay Club tables. The exact table name will be shared when the raffle date approaches,
But good on sportsbet to revive their own vip system a bit more to make it look like the player will get more benefits instead of taking them away like other sites are beginning to do lately.
Bottom part of your post is the reason why I am currently using Sportsbet almost exclusively. That clubhouse program is a thing of beauty and it is giving me very nice boost to bankroll. This raffle promo will make it even better. Did it just start or I missed it for last month? Would be very pissed if I missed it since last month was the first time I hit Diamond rank and prizes for Diamond look very sweet indeed According to the specific guideline:
The raffle will take place on the OneTouch Bombay Club tables. The exact table name will be shared when the raffle date approaches,
But good on sportsbet to revive their own vip system a bit more to make it look like the player will get more benefits instead of taking them away like other sites are beginning to do lately.
Is there some stats where we can see how much players has hit each rank? I guess it will have to be sort of public when raffle starts.