Groupon: $100 Newegg Gift Card, Plus $10 Promotional Gift Card for $100.00. Here is a screenshot for reference. Gift cards are generally stackable with coupons so the way to get the best deal is to get these gift cards at essentially 10% off, and then when it’s time for you to make purchases, use coupons stack on top of these gift cards for even more savings. It is important to note that the $10 promotional gift card expires in 90 days so use the promotional gift card before the $100 gift card, which never expires.