为什么服务一个高度忠诚的顾客的成本原则上与服务其他类型的回头客的成本是不同的，这一点完全不清楚。

It is not at all clear why the costs of serving a highly loyal customer should in principle be different from those of serving any other type of repeat customer.

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生命周期价值通常用来判断拉顾客的成本是否合适。

Lifetime Value is typically used to judge the appropriateness of the costs of acquisition of a customer.

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较低的成本对顾客来说也有好处。

Lower costs would be good for clients, too.

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