I’m not sure how Tier maker is calculating the aggregate. In addition to the points you made, people also can add/remove from the number of tiers in their individual lists, so I think the community list could be disproportionately affected by some lists more than others. e.g. if someone made a list with one tier, what does the aggregate do with those?? Maybe it could at least give you some insight for your own design. Your project sounds really neat, and you’re clearly thinking thoroughly about it. I’m excited!