Hello,
We changed the setting from 730 to 365 yesterday. All users that were deleted yesterday had logged in at least once.
Please consider this example from the user logs:
created_at last_seen_at last_posted_at last_emailed_at trust_level
2020-05-08 14:44:07 UTC 2020-05-21 10:50:59 UTC 0
(they were created once and emailed once; all their other stats zero).
We are on 2.8.0.beta10.