The real marketing trick is making you believe it is a cookie, and not some mixture of weird chemicals and ingredients that can only be identified by a code.
Every artificially created ingredient has a code, for instance here in Europe we have ingredients listed as E-numbers. These ingredients are often used to replace organical/natural ingredients. You will see that if you buy pasta sauce in the grocery store, they've probably added some E-numbers to make the color of the sauce more red. These ingredients are not necessary at all, these are either marketing instruments to make the food look more "tasty" or to replace a more expensive product with a replacement chemical. We don't know the long-term effects of these artificially added ingredients yet, but what I do know is that I know more and more people with allergies related to these artificial ingredients.