I'm a moderator for a relatively large channel that used a channel points reward to integrate with a crowd control mod, and the reward was redeemed some thousands of times over the course of two streams. To get these out of the queue would take hours of refreshing the reward queue page (which displays only 100 of one reward at once) with an autoclicker on, or deleting the reward and replacing it with a new one. Neither of these seem particularly optimal, but a button to mark all as complete would nullify the issue—though it is of course a minor issue.