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Re:Ask HN: How does Reddits' real-time upvote counter work? by ev1 on Thursday November 12, 2020 @05:05PM (#25075746)
This comment on Reddit says it's fake, and it just arbitrarily starts the counter lower than the current score and slowly counts up to the current score to fake activity.

Includes source.

https://www.reddit.com/r/assholedesign/comments/jqazmu/reddi...

                  initialDisplayCount: o - s,
                  countToUpperBound: o,
                  initialDelay: k,
                  subsequentRecurringDelay: _,
                  incrementDelta: m,
Re:Ask HN: How does Reddits' real-time upvote counter work? by farouqaldori on Thursday November 12, 2020 @05:17PM (#25075932)
Well, that's underwhelming! Expected some serious architectural design.

Cool component nonetheless, makes sense that it's fake since the majority of users wouldn't bat an eye.