Free bonus miles points/miles with United, American, Amtrak & Air Canada
Thanks, View from the Wing Blog

Fill out a short survey and/or sign up to receive emails and earn the bonuses below.
250 free United Airlines miles
250 free American Airlines miles
250 free Amtrak points
1000 free Air Canada miles

These promotions are great because most airlines require some activity (air or partner) within a certain amount of time, otherwise they delete your frequent flyer account. Most airlines recognize these registrations as a qualifying partner activity therefore keeping your account active.