Audience size grows rapidly as posts gather more feedback, though this growth slows when a post has feedback from five unique friends. Posts with no likes and no comments had an especially large variance in audience size: the median audience was 28.9% of the user’s friends, but the 90% range was from 1.9% to 55.2% of the user’s friends. So, while users may be disappointed in posts that receive no feedback, the lack of feedback says little about the number of people it has reached.