the earned-vs-opaque distinction is the whole reason the impact metric works. if the number moved for reasons you couldn't trace it'd feel like slot-machine feedback. because it tracks actual posting and engagement, watching it climb feels like cause-and-effect, and that's what keeps people showing up.

看着自己组的影响力因为大家真的在发帖互动而上升,这个反馈闭环确实很爽。数字动是因为组真的更活跃了,不是因为什么看不懂的重算,这让指标有种挣来的感觉。能回应真实行为的透明激励太少见了。