Maltodextrin is another starch based sweetener. You usually see it in conjunction with artificial sweeteners (in this case aspartame and acesulfame potassium) for flavor optimization. Without maltodextrin, these powders would taste significantly sweeter, believe it or not.
Each serving of Crystal Light only contains five calories (all from the maltodextrin), so you are looking at a mere quarter teaspoon of added sugar.
These powders are certainly test-tube creations. That said, I don’t see anything alarming with having them a few times a week.
Remember — nutrition is about consistent dietary patterns. If, for example, these Crystal Light drinks make you crave large amounts of Doritos, that is more troublesome than if these drinks are an occasional addition to a diet is generally high in fruits, vegetables, whole grains, and legumes.
I’m just generally not a fan of artificial sweeteners because they don’t help us train our palates to get used to lower amounts of sweetness in our diet.