What @codydeeds has described in terms of algorithm is just the tip of the iceberg, really. The bot can do sooooo much more than follow the leader. There's currently 65 different bits of information you can get to decide on whether or not to vote on a post.

In fact the stated purpose of the bot is to go much deeper and look at the content of posts, keywords, whether or not there's only images / video, and the network of the poster, including votes on the post, etc. There's a little bit of NLP that I'd like to expand.