问题在于，抽佣并不是一项可以无限抬升的变量。它直接作用于供给侧的现金流结构，而供给侧恰恰是整个系统中利润最薄、弹性最小的一环。无论是司机、酒店还是本地生活商户，其净利率长期处于个位数区间，人工、租金与能耗等成本具备明显刚性。当平台费用持续抬升，结果往往不是少赚一点，而是迅速逼近盈亏平衡线。
But I feel like I’m getting ahead of myself, so let’s start at the beginning.，这一点在Line官方版本下载中也有详细论述
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Accuse the agent of potentially cheating its algorithm implementation while pursuing its optimizations, so tell it to optimize for the similarity of outputs against a known good implementation (e.g. for a regression task, minimize the mean absolute error in predictions between the two approaches)
Developers using the streams API are expected to remember to use options like highWaterMark when creating their sources, transforms, and writable destinations but often they either forget or simply choose to ignore it.，详情可参考91视频