In an effort to cut costs many airlines are changing their policies regarding frequent flier miles. We are members of Air Canada’s program called Aeroplan . The airline changed there policies this January, read the details in our post.
Members whose account are inactive for a defined period will lose their points. Some airlines will let you buy back your points for a fee. Seems ridiculous buying back what you already own.
You can keep your account active by making a transaction at stores that are affiliated with the program.
For details on the terms of different carriers see this article in USA Today