Once a week, I watch a film from the very bottom of my Netflix queue to try to get a feel for what lies at the other end of the algorithm. I've stumbled on some gems viewing things this way the past couple of years.
At this stage I'm working on a theory, so this list is for research purposes. I don't have any particular results in mind, but do have a mild hunch about why particular films fall to the bottom that isn't based on popularity.