It will be better too if you will have an info page on how your VIP level works clickable on the VIP page. Everything stated in there is too generic which doesn’t contain how much percentage is rakeback per VIP level and other info.
Or perhaps, after showing the percentage, they also show the actual amount to wager on the right side. That way, players will get motivated to push for the VIP level and wager more. I think it's worth a try implementing it, especially if it adds complexity to people who were only looking to play and get certain bonuses. Percentage and actual amounts should be displayed when looking at that statistics.