I got a DM yesterday from Forbes magazine. Last year I subscribed to Forbes, because their offer was ludicrously cheap. To be honest, I think it's an awful magazine, and found myself not reading most issues, just quickly skimming them.
Anyway, yesterday, they sent me a user survey. The interesting thing was, to try to persuade me to somplete the survey they gave me $1.
In the envelope was a crisp $1 bill, which was "a token of our appreciation". They suggested I donate it to a charity of my choice. Since I don't know when I will next visit the US, I will probably take their advice, but I just thought it was rather bizarre of Forbes to send a dollar to all their subscribers.