A broken webhook used to get retried on every single event, forever, whether its address had moved, broken, or just stopped answering. One webhook alone racked up over 170,000 failed delivery attempts in a month.
Fulcrum now pauses delivery to a webhook after it keeps failing, still sends it one event a day to check whether it is back, and turns delivery back on automatically the moment that check succeeds. You can also re-save the webhook any time to reset it yourself. Paused webhooks show their status right in the admin grid.