(Just back from our Chicago conference. Sorry for the delay in getting back to your question.)
Promotion of that program ended about ayear ago and support for it ended in the last couple of months. It was a partnership between Staples and PTO Today that -- despite great efforts by Staples and us (if I do say so...) -- just didn't take off.
We obviously still think Teacher Appreciation is a great idea, and we know that Staples has tons of great products for teachers, if you want to buy the gift cards on your own.