I went to a test showing of a new pilot of a different show, and an episode of this was shown afterwards. They said it was canceled, even though it got very good ratings (top 10), because the lead actress wanted a pay raise, but she was thinking of revisiting the show. I had never heard of the show before, so at least the first part rang true. The second part was probably a lie. My guess: This show is used as a "control" to set the audience's overall mood for the new show they are actually testing. I found this show amusing (better than the pilot they were actually testing), and, judging from the audience's reaction, the rest of the test audience did too. So, they used this as a show that they knew usually got a good score (but one almost nobody had ever heard of), just in case they got an audience that was happened to be extra grumpy the day they tested. Judging from the first comment listed for this show, it's clear they have been doing this since at least 1999.