I have been on at least one flight that went out with empty seats in FC while I was on the UG list and would have cleared. I could have asked but decided to see how it would play out as I wanted to observe and understand why the GA did not clear the UG list. In this case there was no obvious reason. I sent in a complaint with my observations with the comment that the GA just did not do their job.

As such, what did you observe? Did you say anything??