I used to belong to just about every plan available. I had accumulated quite a few miles when I flew to Asia. And when DH and I were dating, we lived in different cities so I was always flying to see him (easier for me since I was a student and he was working). I'd choose whoever was cheapest and most convenient so the miles were spread out. After we got married, I'd fly home to see my parents or I'd fly about once a year for work. But for all that flying (which really wasn't that much), I never got enough points for a free ticket. Then with airlines consolidating, my miles would get lost. Sometimes, I'd get free magazines subscriptions, just to get something for my miles.
I used to have enough miles on one airline for a free ticket, but they upped the requirements and I don't anymore (grrrr). I was about to lose my 40,000 miles and these I care about. I'm sooo close! I went shopping on their site to see what I could buy for cheap, but the only thing that remotely appealed to me was a newspaper subscription. But wait! I could donate charity miles. That's a win win. I scrolled through the list of recipients and at first I choose the Red Cross. But then I saw the Shriners Hospital. I know Uncle T donated lots of time and money there and they provide their services for free. While there was no way to formally donate in his honor, I know in my heart I did.