How Are Fake Followers Identified?
Quick answer
Fake followers show up as patterns the numbers cannot hide. A huge audience with tiny engagement, sudden follower spikes with no viral post, generic one-word comments and a following skewed to inactive or bot-like accounts all point the same way. A vetting tool samples the audience and scores how real it looks.
I understand the idea of fake-follower detection and not at all what it is actually reading. How are fake followers identified?