In addition to subscriptions, the revenue model includes referral fees, transaction fees, consumption-basedpricing, performance-based pricing, reseller margin, and revenue sharing.
除订阅外,收入来源还有介绍费、交易费、基于消费的定价、基于性能的定价、转销收益及收入分成。
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The theory is called the consumption-based asset pricingmodel.