While calculating participant_count we are ignoring hidden post users.
In above example (both images are from same topic) the first image includes hidden post users since logged in as admin. So it have 21 Frequent Posters. In second image while looking at the topic as anonymous user it correctly shows 17 Frequent users by excluding hidden posts.
For staffs we will render hidden (deleted) posts. That’s why it included them too in “Frequent Posters” list. Should we hide them?