Subscriptions
Grace period
A grace period is the interval after a failed payment during which a subscriber keeps access or continues to receive deliveries while recovery is attempted.
It trades margin for retention. Too short and you cancel subscribers whose payment would have recovered on the next retry; too long and you ship goods to people who will never pay.
For physical goods the calculation is harsher than for software, because the cost of an ungranted period is real inventory rather than marginal compute. Most brands should set it against their observed recovery curve rather than by intuition.