@B_Dub said:

I don't understand how there are 11 no votes for Fall 97.

Because some probably think it should be in second—or perhaps third or fourth place—and the only way to get it there is to downvote it. For example, I love 97 but I want it below 95. I'm one of the 11 15. Relatedly I want 98 4th, which is where it is, so I've abstained. If it moves or I sense that it's threatened, then I'll vote up or down.

Ranker gamifies polling, and I've warmed to it. Maybe I'm wrong in seeing it as a game, though. I do hope its analytics and insights are shared in a blog post soon.