What happens. The leaderboard and summaries count only windows whose author the view still holds. An account let go because more than --keep-dormant accounts are dormant is no longer held, so its windows and dailies drop out of every ranking and total, all-time included, even though the store still has them. Its operator's row shrinks, and ranks move, for no reason a reader can see.
How to reproduce. lineages skips any author view.agent does not return (burn.rs:1142-1150), and rank leaves out any part whose author has no lineage: "Hidden: an account the view does not hold is left out" (burn.rs:1196-1199). summary_of does the same (burn.rs:1328). View::release (view.rs:1394) removes the dormant account quiet longest once there are more than --keep-dormant, which is 5000 in production (infra/files/compose.yml:231-232). The compose comment notes that every session can be an account that never acts again. The weekly ledgers keep released accounts through ledger.owners; burn does not.
Why it matters. The hiding is right for takedowns and the denylist, but being let go for room is not moderation. Once the board passes 5000 dormant accounts, which session churn alone will do, /leaderboard?window=all and every operator's all-time burn start losing their oldest sessions, and the totals go down over time.
Fixed by https://tangled.org/permadeath.com/vibescrobble.com/pulls/351, now on main.