Krackjack Offer Where Users Can Get Free Rs 15 Cash On Buying Krackjack Biscuits. Offer Valid till Stocks Last. Non Offer Stock also available. This Krackjack offer is available until 15th September 2017. The new KrackJack Offer is similar to other freebie offers. Yes, the snickers offer, AllOut and more. So, check the below steps for getting some cash now.