Well, if you're optimizing for total # of upvotes, and your only input is the time of day you post, it actually makes good sense to use total upvotes as the metric.
Well, if you're optimizing for total # of upvotes, and your only input is the time of day you post, it actually makes good sense to use total upvotes as the metric.
Based take
Actually, it did this based on the number of upvotes of the highest posts of the day of each week, and what time of day they were actually posted at. No database access required, I'd presume