I wonder if the Wayback Machine people are using a (potentially more modern) version of the AOPIC algorithm to decide what to archive. I wrote an article about that algorithm (which is similar to the original PageRank, but simpler IMO), and stated that a service "like the Wayback Machine would probably use something like AOPIC." It would be nice to remove that first like from the sentence!
[1] https://intoli.com/blog/aopic-algorithm/