Update:
1. Unable to buy JIO value plans (479/1899) directly using any reward points. tried with AU rewardz and SBI rewardz... its showing unable to proceed, pls. try later.
2. will check tomorrow (regarding amazon wallet Friday offer through jio-linked wallet method)
3. Price protection not applicable. later found out the t&c mentioned that the facility is upto 6 months of plan enrolment date. I did my last recharge more than a year ago.
---Now I have three possible option
1. try paying 479 through amazon wallet rupay offer if I am able to apply. (will test tomorrow)
2. recharge using AU rewards. I have about 45000 balance points. (at 20% discounted redemption than gift voucher). This better than using airtel-axis cc.
3. recharge through amazon with 899 for 90 days (Friday offer). (best value buy for 2gb/day +20GB extra)