That's strange, it didn't work for me. I'm a subscribed 1.5 customer, but this is my first order of 2.0. Not sure if that makes a difference. I guess I will hold off on ordering until we hear back from Conor whether the coupon is still available.
EDIT: Never mind, I'm an idiot. I accidentally hit the "purchase once" rather than the "subscription" button. It did work for me once I chose to subscribe monthly.