Sadly, it looks like my Bing Rewards account has been terminated. I'm not completely sure why. They have a list of reasons why an account would be cancelled, and I've narrowed it down to two options.
1. You are a robot. That's not true, obviously, but a few times, Bing asked me to re-login, to prove I wasn't a robot.
2. You don't do Bing Searches, for the purposes of getting search results. Partly true. I mostly did searches, for the purposes of getting $5 rewards cards.
Well, so much for that gravy train. I mainly used it to buy books, so I could review them. I guess I'll have to settle for reviewing books that I already own, instead of buying new ones.