Reddit user The imperfect square shared a tip for unused monthly credits (eg American Express Delta Gold). If for some reason you are unable to use the credit that month, you can add an additional tip for a previous trip that was up to 30 days in the past. Not as good as Tip for Instacart where you can donate unused credits to charity, but better than losing out entirely. Do you have any other good uses for unused credits? Tell us in the comments below.
