Hi Barbie! Welcome to Atkins! I've been on Atkins since February of 2007, and I can honestly say that I have never once bought any of the Atkins bars, shakes or other products. It is a business, and i suppose they feel obligated to sell their wares, but I don't need them. And you're right, the whole reason carbs are limited is because they screw up your blood sugar and create cravings. Why eat something that will mimic the action of carbs? The whole point is to get to where you don't WANT sugar and starch, not to want them and every once in a while eat an Atkins product to satisfy the urge!
I really like this diet, it works for me. I hope it works well for you too! Welcome!