Thanks for the information.
This shows that unlike others Jio is not Rigid but considerate and values its loyal customers. Otherwise people like me who have done multiple recharges of ₹303/- would have been stuck with 28 days validity.
The first 303 recharge will give 28 days (28GB) - as it has also provided 90 days Summer Surprise. Whereas 2nd recharge onward ₹303/- or ₹309/- will give 56 days (56GB) validity per recharge now. In short 303*3 will be 28 + 56 + 56 = 140 days (140GB) + 15GB (5GB*3) additional if applicable.There is also additional 5GB data benefit associated with every ₹303/- recharge done before 31st March 2017.
So its all win win situation.