It’s been multiple city pairs over the course of my career and maybe they don’t know I’m listed but shame on them for not having that discussion with the gate agent before ever getting on the plane. If I know it’s going to be full or close to full on my own metal I’ll specifically ask the gate agent if there are other jumpseaters listed and then tell the agent I’ll take a seat in the back so the next pilot in line can have the jumpseat. Again, something I assumed was “normal” to do.