I use JUNIO and FABMONEY - both prepaid (preload) RuPay cards. I have taken both physical cards. Initially, both were giving cashbacks for loading money into the card. Nowadays - that's a bit reduced.
We get 1% to 1.5% cashbacks on almost all expenditures using these cards. At times, even 2%. Quite happy.
Both have their own Apps with OK features. Both RuPay cards work flawlessly on offline POS machines n in online use. Most UPI Apps also handle these prepaid/preload cards.
I am happy with them.