Airtel on Thursday announced 'Happy Hours' for its prepaid customers that will offer them 50 percent data back for all in-app content downloads done between 3am and 5am. In order to execute this offer, Airtel has encouraged developers to integrate the option of scheduling the time for downloads within their apps.
Airtel has provided a free API to developers for them to integrate the download schedule mechanism
Airtel 'Happy Hours' Offers 50 Percent Data Back on In-App Downloads to Prepaid Customers | NDTV Gadgets360.com
Too much effort for too little reward.