Surprised that no one has mentioned the other side of a program - Answering the questions.
Yes, cool, a guy walking in unknown city, takes a photo, and gets personalised answer from a friend.
On the other side: a guy doing something more than meaningless, gets a mobile notification that his friend asked for the knowledge he knows about. Sounds like a perfect distraction - any time, any place, requires an action taken.
Taking stackoverflow in comparison, user is not delivered with random questions in random periods of the day.
Yes, cool, a guy walking in unknown city, takes a photo, and gets personalised answer from a friend.
On the other side: a guy doing something more than meaningless, gets a mobile notification that his friend asked for the knowledge he knows about. Sounds like a perfect distraction - any time, any place, requires an action taken.
Taking stackoverflow in comparison, user is not delivered with random questions in random periods of the day.