Ingenious idea, yakky!
I was considering picking up this extra gallon (that will sit on the shelf for a while b/c I'm already using this new gallon I got from ADS), but I decided not to go for it, even though it's only $29.99+shipping.
Then you have to come up with this idea to use the Discount Code, and that put me over the fence! I totally forgot about that code

Now I have to get some.

Edit: Nevermind; shipping is still $9.99, which pushes me back up to $40. I'll pass.