NNN was an interesting case. The win/scored admins were monitoring the subreddit for months and preparing for the migration to c/NoNewNormal community. That did not happen the way the admins wanted it. There was a significant increase of the active users. But that number dropped off in a month and continued to decline in the next 5 months or so. Over 31.5% of the posts made during that period were deleted, which contributed to 72.5% of all deleted posts to this date.

If that community had public logs, we would be able to look at the specifics, such as why the mod removed tallest_skil's posts there.