Honestly, I don't have answer.My only question is WHY? Why do you need to go with these shady stuff? What's the harm in sticking to mainstream banks? These bank accounts are giving 3.5 to 5% for funds till 5 lakhs, which you can get in other much established banks as well. (Try flexi option).
Also, look for only one thing, either a Zero Balance Account or a High Interest Account, otherwise you'll fall for their marketing tactics like here they have shown that with a zero balance account, you can get ~7% whereas in reality you will get ~3.5% only till first 1 lakh.
I just like to open zero balance account which are completely free of charges ( not Debit card charges)
When it becomes chargeable, I close them.