Google is running a sweet promotion to entice owners to give its mobile payment system, a shot, as it will be offering a $20 Best Buy e-gift card for those who use the service before December 31. To be eligible for the promotion, you'll need to use Android Pay on a Nexus phone, like the Nexus 5X, Nexus 6 or Nexus 6P, or with a tablet like the Nexus 7 or Nexus 9.
