#sbi cashback

What are the exact criterias which SBI often approve for having the SBI cashback credit card and why the rejection rate usually occurs with this card and what are the solutions to it?? If anyone knows in details and something extra let us know it will be very helpful..

Does Sbi cashback provides cashback on park+ app? Also, if I buy Amazon pay gift voucher from sbi cashback card directly from Amazon then in that case will I get the 5% cashback or not? @abhimarda @TaxWiser @Skylar Could you please comment.

My wife cibil score is not good, she just had one fd based idfc credit card but with no use till date. Her sbi saving account is offering pre approved credit card in which sbi cashback is also available .. My query is if I apply her sbi cb card thru cashkaro or gromo type apps for extra cashback...