While looking at who was rewarded the Custodian Badge, I noticed that the user this user was rewarded the custodian badge for completing a review task in the queue suggested edits. Their only Stack account is Writing SE and in Writing the user has less than 200 reputation points. You need 1k amount of reputation points to review the suggested edits queue.
How did the user review in the suggested edits queue if they didn't have enough rep points to do so?