This article is an on-site version of the Free Lunch newsletter. Premium subscribers can sign up here to get the newsletter delivered every Thursday and Sunday. Standard subscribers can upgrade to Premium here, or explore all FT newsletters
本文为《免费午餐》(Free Lunch)新闻通讯的网络版文章。高级订阅用户可点击此处注册,每周四和周日收取该通讯;标准订阅用户可在此升级为高级订阅,或浏览所有FT通讯