I had two certs due to expire later this year, both for category 1-4. Had an unexpected family event I needed to go to and ended up using it both for two rooms for myself and family. Worked out really well. There were other higher category hotels that were closer to the destination, but it was a nice way to break up a drive too.
Since these can't be given away "technically", I was thinking I would do a staycation somewhere if it comes near expiration dates. Don't need to anymore, but I wouldn't waste it. A staycation is still relaxing.