In last few days I paid 2 bills and received cashback for that bills (used sbi unipay)just to confirm, HDFC Plat DC + Unipay is still working? I paid one CC bill last month and did not receive any rewards. A friend of mine also did the same earlier this month and he also did not receive any cashback.
Afaik it's working but just for confirmation I will pay one more bill through sbi unipay and I'll update here