Carr's (the local Alaska grocery store bought out several years ago by Safeway) periodically offers these bonuses in addition to the base miles you earn if you've signed up for the shopping promotion.

Sometimes it's an across-the-board promotion, sometimes you have to sign up, and sometimes it's targeted to your "Just4U" personalized deals based on your shopping habits.

And you're correct, this type of promotion is only offered to shoppers here in Alaska.