Tried this code on a number of brands that normally don't allow for discounts including all North Face, Yeti Coolers, and Patagonia. Didn't work on Yeti bikes but seems like they are being a lot more lax with brand restrictions.
The deal I tested was at the top of the backcountry.com website with an automatic discount once you click the apply to cart link:
Top of the website reads:
Take 20% Off One Full-Price Item — Apply to Cart