Comparisons
Comparing two snapshots
Pick any two snapshots and see who was gained or lost between them. Same coverage rule as the automatic diff.
Open a profile's Compare snapshots view. It lists every snapshot the profile has, and lets you pick two — not just the most recent two. New members are accounts present in the newer snapshot but not the older one; removed members are the reverse.
The comparison is reconstructed from the membership table's own `first_seen_at` / `removed_at` columns, not from a per-snapshot log. That's why arbitrary snapshot pairs work, not only adjacent ones.
Below 99.5% coverage on either side, the comparison is withheld and the page says so — for the same reason described in "What coverage means".