Each audit takes a random sample of 5000 Twitter followers for a user and calculates a score for each follower. This score is based on number of tweets, date of the last tweet, and ratio of followers to friends. We use these scores to determine whether any given user is real or fake. Of course, this scoring method is not perfect.
I don’t know if there is some sort of algorithm that works in a way to differentiate between fake and a inactive follower. TwitterAudit isn’t certainly a standard measurement tool for Fake followers. You can surely say if someone has increased their follower count by inorganic, fraudulent, or dishonest means.
I gave it a try and the results were really good, I tried to look up for few of my friends as well.
Kim Dotcom has some intresting finds using TwitterAudit. Look at his tweets.
— Kim Dotcom (@KimDotcom) May 2, 2013
— Kim Dotcom (@KimDotcom) May 1, 2013