I asked about the algorithm in this forum two years ago because I was curious about it, and learned that nobody knew much because the guy who built it left IB several years prior to then. So, maybe there's some reticence to continue using a black box that might no longer be cutting edge? If so, making a new algorithm wouldn't have to be super challenging. I've mentioned that showing new posts only would be an improvement over the current solution (i.e. nothing). And, this could presumably be optimized in short order... perhaps even based on input from those of us that use the website.