When I add it to my shopping cart, it's regular price. Even though I've both liked and shared it. In trying, about 1/3 of the time I get the "check discount" option. I click it and it does nothing.
Tried on 2 browsers, each after logging in through FB. I'm on a Mac, if it matters.
I've tried numerous times on the last few promos with no luck. Going to try my husband's PC next.