https://www.desidime.com/discussions/cred-cashback-rewards-unlocking-for-7-days-now?page=1#post_9887826
It's only 1 day for me. I pay Rs 1000 bill and get Rs 1 cashback and a useless voucher. The next day I do not see the reward for the same card. Surviving without Cred till the bill payment using HDFC Platinum Debit Card is working.
I've unlocked all 12 cashback spins. On day 1/7 I now have 96 rupees cashback.