A program that grants points for using Bing search, which users can redeem for gift cards, sweepstakes entries, or charitable donations.
Many moons ago, you could have shared points between family members, who had a Microsoft (i.e. Outlook, Hotmail, Skype, ...) accounts. That feature was removed due to people abusing it, I assume. As one could have had multiple accounts and earn points across them, then share them to their main account. There are tales of such behaviours, if you look around the forums.
That being said, the only method to allow others to use your points is to redeem them in form of a gift card and send the gift card to them. I sometimes send my brother an Xbox Ultimate subscription, which he can use when he hadn't been able to keep his streak going due to work or other responsibilities taking over than gathering points.