Would You Pay $30 a Month to Check Your Email?
nytimes.com
nytimes.com
https://www.nber.org/papers/w24514
Also Tim Harford has had some interesting things to say on the topic.
http://timharford.com/2018/05/how-much-would-i-have-to-pay-y...
Some of the app’s features — such as ones that let users undo sending, track when their emails are opened and automatically pull up a contact’s LinkedIn profile — are available in other third-party email plug-ins. But there are bells and whistles that I hadn’t seen before. Like “instant intro,” which moves the sender of an introductory email to bcc, saving you from having to manually re-enter that person’s address. Or the scheduling feature, which sees that you’re typing “next Tuesday” and automatically pulls up your calendar for that day.
Outline doesn't work with NYTimes anymore either, it appears.