Recently I started a running group for my locality. And sure enough from time to time people join and we are now with 8 members.
But strangely enough I got a notification when someone joined with only four members. The other three joined silently.
And also these three that joined silently don't sync their run data with the group: while the other five (including me) regularly post runs and are ranked in the leader-board, these other three are not.
Lastly, the three silent members have locked down profiles, so I can't check anything about them...
Could they be fake accounts? Do other people in groups see similar ghost accounts?