经济学家科斯的交易成本理论早已指出：一笔交易能否成立，关键在于成本是否低于收益。HTTP 402 想象的是“5 美分买一篇文章”，可在信用卡主导的年代，每笔交易的固定手续费约 25–35 美分。换句话说，为了 5 美分的内容，用户要花 35 ...

Here are all the best practices and common pitfalls you need to know before and after you make the switch from HTTP to HTTPS. While Google is giving you a nudge and trying to be as helpful as possible ...