Rankings
One number decides the order and it comes from votes on matchups, not from plays, followers or reach. A track that has not been voted on sits where it entered.
Reading the board…
Rating is Elo: every track enters at 1500, a result moves both sides by the same amount with a K-factor of 32, and nothing falls below 100. Tier is a plain label for the rating band, not a separate judgement.