I'm not sure how many people here use Bing rewards. Is it a driver of traffic for Bing? I guess it must be otherwise they wouldn't keep running the program.
Today we are taking our very first step to let you search and earn on the go. Available on iOS and Android devices starting today and coming soon to Windows Phone devices, we are rolling out the ability to search and earn and take advantage of offers right from your phone. Over the next several months we’ll be extending nearly all of the Bing Rewards features our members love on the PC to these mobile experiences.Bing Takes Its "Rewards" Mobile [bing.com]