What are not common gift cards?
Just about any gift card is available on any of the well known crypto -> gift card sites (bitrefill, egifter and so on)
On the other side I have never found a card that could not be traded on the gift card exchange sites.
-Dave
You named 2 sites, one is currently not available and at the other one i don't see any option to sell but only to buy.
Not common cards: Great wolf lodge, Truluck's Restaurant, Don Pepe, Bluesmoke, Firehouse subs, Columbia, Visa 4097.. to name a few.
Please share links if you like to help.