Badgr has an opt-in process for Canvas learners that may be optionally enabled across the entire Canvas account.
When enabled, learners must opt-in to receiving badges before they are awarded. If a student chooses to opt-out, they will not receive badges in any Canvas course and their name will not appear on the Leaderboard.
Teachers can see which students have opted-in from the Progress tab of the Badges menu.
Contact us if you'd like us to enable this feature for your Canvas instance.