I mean what is the maximum deposit bonus you are going to give.
Its upto 1,500 each as they've mentioned on the website.
Also, is there any rule for wagering bonuses?
Wager is 50x
when I would be able to make the bonuses as cash for withdrawal?
You need to wager within 14days otherwise bonus will expire and you cant covert it to cash.
Source:
https://bet24star.com/casino/welcome-bonus