I've observed, and noted before, that my scores generally rise briefly just after a story completes (as all the fans who've been reading all along post their final score for the entire story, rather than just the latest chapter, but the scores quickly fall after that, as you get an influx of readers who hadn't found the story compelling enough to read while it was posting, and who find the entire premise not to their taste.
It generally isn't until about a month or more later that you see the real scores, whether it rises for tumbles. When one story, "Zombie Leza", was getting little attention, I mentioned feeling disinclined to continue posting in the current political environment, and ended up with my highest score on the site (I think it was FS). However, those scores finally normalized and now they're again new the bottom of my scores.