You can sign up with the Salem Fire Corporation, pay a yearly subscription fee, and if your house catches on fire, they will come and put out the fire.

你可以和塞伦消防公司签约，每年支付会员费，如果你的房子着火，他们会来灭火。

耶鲁公开课 - 公正课程节选

This means that there will likely be a substantial number of loyal users willing to pay the subscription fee for content.

FORBES: NYT's Online Paywall Has More Ups Than Downs For Stock

Going forward, growth in the subscription fee is likely to slow due to pressure from pay-TV service providers and expected competition from NBC and Fox, who are planning to launch nationwide sports networks to compete with ESPN.

FORBES: Can ESPN Keep Raising Prices With Competition Heating Up?

As a result, the average subscription fee has declined slightly more than what we had originally expected.

FORBES: Headwinds for Almighty Netflix