Alaska Airline Mileage Plan is strictly a frequent flyer program, i.e., they purge the records of anybody who hasn't flown with them for 2 years. This isn't just a case that the miles expire. No, they eliminate the account and anything that shows that you had an account. I guess Alaska has no interest in infrequent flyers. I find this to be a bizarre anti-marketing, anti-customer attitude but then what do I know.