Make sure to use this in 90 days (or your CC’s chargeback period. The $100 Newegg Gift code I bought through Groupon was mysteriously used by someone else. Neither Groupon, Newegg, Citibank, nor Consumer Protection Agency would help. Despite its A+ rating, Groupon currently has a 97% customer DISapproval with the BBB.
https://www.bbb.org/chicago/business-reviews/ecommerce/groupon-inc-in-chicago-il-88367005
Good luck with them or enjoy trying to get your money back.