The point of "Pimp your Plot," which I believe failed to actually get mentioned on the program, is for the guest to pimp out one plot, whether it's one they're playing in, running, reading, or preparing to run. It's purely a way to draw in players (onsite or offsite) to the featured plot. If you guys want, I can restrict guest GMs to only talk about one they're running or plan on running, where I can ask more plot-related questions ("so, can you give us some insight on what's going to happen next aboard the ship?") but I think an enthusiastic player is just as fun to listen to, and can tell about their own experiences on why they think the plot they're in is so good to get more people interested.