In my opinion, next time they will came with
- Deposit Rules
- Wagering Number from other Casino VIP
- Rank VIP
- Wagering Amount

I'm sure, these will make fewer people get accepted. Also, I know casino making some promotion to hopefully the money they're spend on promotion is coming back again to them. With waggering around 15-20x should be enough to make the money came back to them but with a chance player also can really high chance to finish these.

Unless, 50x waggering. I usually skip, because is not good for the player