I have tried putting this widget into the sidebar. It worked once and then just disappeared. I don't know if it is just a very slow connection to the server or what. My sidebar work-around is a text link to my store at GCU along with a single card to purchase. Clicking on the single card however does not take one to my store. It takes one to my card, along with the option of seeing 700(?) others in that category, (by other people).
Nope - that code just does not seem to work.