no, unless they made you click a box, such as the "i have read and agree to terms of use" box that we all click without ever actually reading the terms of use then no; no one entered a contractual agreement with t11.
I was under the impression that the act of purchasing the deck itself came with the consent that you would follow their restrictions on not previewing it before the release date. It's not always clicking a box like the EULA for computer software - sometimes the act of purchase itself constitutes agreement to the terms under which it was sold. By making the purchase, you are in fact giving consent.
Should you disagree with the agreement, you are free to not purchase the item. Ever try using an unaltered piece of software without agreeing to the EULA during the install? It doesn't happen. In that sense, the purchase would be exactly like the EULA.
I'm not trying to be a pest or a b@11buster, just playing a little "devil's advocate" here.
