For the past 3 days, they have been having 'MOBIKWIKHAPPYHOUR'. Where you get 50% Cashback (Upto Rs.50, once) if you add money to the wallet between specific times. The last 3 days, It was 6-8 PM, 4-6 PM & 3-4 PM. I suspect they will have one tomorrow as well, and maybe between 2-3 or thereabouts, so watchout on Twitter if interested.... MOBIKWIKHAPPYHOUR will be the redeem promo code.
P.S. I anticipated & got the deal at 3 PM today..