If you don't have a Boxed account, sign up by using a referral link (my link) to receive $15 off your first order in addition to the other discounts referred below. Boxed is an online retailer offering household items and some gift cards. Shipping is free for $49+ orders. In some states Boxed does not collect taxes.
I primarily shop at Boxed to take advantage of the discounts and Amex offers, especially since you can combine them, like in this case where I purchased $200 PF Chang's gift cards for $112.41. That comes to a net $87.59 savings, or 43.8%, so I ended up buying these gift cards at 56.2% face value.
Here's how these great deals stack up for existing Boxed members:
8% off: Boxed currently has the following gift cards at 8% off: PF Chang's, Spafinder Wellness 365, MovieTickets.com, Smashburger. Their gift card stock does change depending on availability.
20% off: The JUSTFORHIM coupon code will give you 20% off your order.
8% off: Top Cashback is currently offering 8% on Boxed. My order tracked right away. If you don't have a TopCashback account you can sign up here (my referral link). Currently they're offering a $10 Gap gift card for signing up via a referral link.
8/14/17 update: It turns out Boxed doesn't earn cash back with TopCashback. My transaction changed from pending $9.77 to $0.00.
25$ off: Tweet #AmexBoxed from a synced Amex credit/prepaid card, use that card and get $25 off your $75+ Boxed order.
The discounts above will stack with any item you buy at Boxed, not just gift cards. Barring any other item discount, the math would come up to 28% off + $25 Amex offer + $15 for first time Boxed orders.
Also, with each Boxed order you can get up to two free samples.