Ben Thompson 这篇长文虽然是在推荐自己的新付费产品，但还是围绕内容的商业模式，提供了诸多值得思考的观点，其中对于我印象最深的就是「Open!=Free」，这个观点的核心是类似 Ben Thompson（或者 Dailyio）这样的付费邮件订阅产品，利用了互联网开放的基础设施（比如邮件协议、Web 协议），从而实现了内容的「低成本」触达与用户的「低成本」消费，这与 Spotify 这样的流媒体订阅完全不同。有一段定义值得玩味：
Paying: A subscription is an ongoing commitment to the production of content, not a one-off payment for one piece of content that catches the eye.
Regular Delivery: A subscriber does not need to depend on the random discovery of content; said content can be delivered to to the subscriber directly, whether that be email, a bookmark, or an app.
Well-defined Value: A subscriber needs to know what they are paying for, and it needs to be worth it.
