Can be stacked with Groupon's 10% sitewide sale starting at 4pm today and running till midnight (code - QUICK10).
Extra 10% off sitewide offer is valid from 4pm - Midnight, 18th Oct, 2018. Unlimited redemptions per customer (across separate transactions). Maximum discount of $40. Other exclusions apply.
Enter code at checkout. Cannot be used with another discount promo. Discount will be applied to a single voucher in a transaction. Unlimited redemptions per customer (across separate transactions). Maximum discount of $40.
Note that 15% cashback is via Shopback app. All other purchases are 12% cashback.
They may as well make 15% the norm. This is beyond ebay. It's more like Kathmandu now. Great free advertising for Groupon though. Either way, no deal for me.