Apologies if my lack of technical ability made me unable to find something like this when I searched. I was on a Lufthansa flight last week and the purser came to my seat at the end of the flight and asked if I wanted to change from Air Canada to Lufthansa with my frequent flyer program. Has this happened to anyone before and what are people's views? It came as a total shock to me as I didn't think I'd be all that valuable to an airline.