Yes.. I Will Try To Explain You
Screenshot No. 1 : Here It's Saying That Paying Your Bills(Credit Cards/Electricity/Many More) Via HDFC BillPay Can Give You CashBack If You Set AutoPay On Them.
Screenshot No. 2 : Pay The Bills Via DC Will Help You To Achieve Reward Points (EasyShop DC) / CashBack (Millennia DC).
Screenshot No. 3 : If You Pay All The Bills Of Yours Via HDFC Bank... So You'll Get A Gift Card Of Rs.500
Screenshot No. 4 : I Don't Use PayZapp So Unable To Explain About That (But It's Like A Wallet... So You Can Load Money Into It... Pay Using It... Can Pay The Bills With That)
Hope You'll Find It Useful!!!