Who on earth would ever want to limit characters in an email. Am I missing some subtle lampooning in the copy that explains this things existence?
It's proven quite useful in my work, so I can see this product as a useful extension of the idea.
That said, the constraint is self-imposed, and I wouldn't dream of obligating other people to do the same just to send me an email.
Alas neither fifty.sentenc.es or life.sentenc.es worked.
I was disappointed.
That said, sure, many people would want to limit characters on a blog. But it's THEIR choice to do so (e.g keep a laconic tumblr style blog), not something forced upon them by the people they communicate with.
And a blog is not a platform for collaboration. Often it's not even open for discussion (close comments etc).
Each blog is its own universe, and you can eithe read it or not.
Emails, we get from tons of places, including people we don't work with directly or are not our close friends, and we cannot just shove "keep it short" to them.
If your Ph.D advisor or an interested VC sends you an email, would you like for him to get a "keep it under 350 words" autoreply? Or do you want your depressed friend, who wrote a 5-page email to explain his fears to you, to get that?