为什么有的服务商给商户开支付账户时，商家收款300以下免手续费呢？

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为什么有的服务商给商户开支付账户时，商家收款300以下免手续费呢？Why do some service providers open payment accounts for merchants, and merchants receive no fee for payment below 300?

Why is it that when some service providers open payment accounts for merchants, merchants receive less than 300 free of handling charges?

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