Yes 1% effective cb upto 500 with other rupay and 5% effective cb upto 1000 with kiwi card. At least as per the offer TnC these are the figures, they are claiming 4% cb with other rupay though.
Cashback is calculated based on the prime status of the Amazon account you card is mapped to. So if your linked account is Prime, you will get 5% cashback irrespective of the Amazon account you are using it on. If you use it on a non prime account you will still get 5% as your linked account is...