As a rule, teenagers have phones on pay as you go.

作为一项规定，青少年买手机都是现买现付。

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Finally, much like everything else with AWS, RDS is a pay-as-you-go model.

最后，与aws的其他所有方面很类似，RDS是一种即付即用模型。

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Then he bought prepaid phone CARDS and sold them to villagers in pay-as-you-go form.

他购买了预付款电话卡，再把电话卡以储值卡的形式卖给村民。

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M-GO is the people-friendliest, new pay-as-you-go digital entertainment service that makes it easier than ever to browse, rent, buy and enjoy the broadest, newest and best selection of movies and TV shows on your screens.

ENGADGET: M-GO video on-demand movie service launches, streams to PCs, Samsung and Vizio players

Change from an unlimited all-you-can-eat business model to a pay-as-you-go business model?

FORBES: Netflix the Unpredictable

Sometimes this leads to counter-intuitive behaviour, such as consumers preferring a flat all-you-can-eat fee when pay-as-you-go would be cheaper.

ECONOMIST: So many ways to pay online