GC order a blacklist trigger?
No. For using coupons. legit coupons you get in your mail or the free item coupons they send you in email for spending $100 or $150 like that.
With Amazon, they blacklist you for having too many returns or for receiving many refunds or credit such as credits given you chat agent or phone agents. Amazon will email you with a warning first. if they continue to see returns, refunds, credits, they shut you down.