Well there is an app called Unlockar, which aims to do just that. Every time you unlock your Android phone, the app rewards you in the form of rupees or uCoins that can subsequently be used to obtain deals, discounts, shopping vouchers, or even bid at auctions at the uShop, (which is basically, Unlockar's online shopping portal).
The lock screen content has been categorised into different channels such as Incredible India, Who Said It!, ROFL, Fundoo Facts, Blast from the Past, Girl Gang, Bro Code, Wanderers for Life, Deals and Discounts, and Mad about Ads. Users can subscribe to the channels of their choice.
