I ask for the Twitter connect just to make tweeting from the app easier. Tweets are like this one: https://twitter.com/spolu/status/443117201621413888 Nothing spammy.
So I think the takeaway is that people are turned off by this - and you can convince people on HN that you won't abuse it. But not everywhere.
And, with a million products attempting to take my time - anything that makes me hesitate (like that I have to allow you to "update my profile") is enough to turn me off.
That's right. I totally understand. The thing is... Twitter permissions aren't very precise.
I just wanted to ask for the permission to write tweets from my app, not to edit your profile. But they don't allow you to do that...
Anyway thanks for the feedback!