Also, remember, the whole point of using these is to spike insulin for a number of good reasons (protein + nutrient delivery PWO). Your body has to process maltodextrin into dextrose so what would even be the point of using it? It's like if I wanted to win a race car, would I buy a Ferrari and be done with it or go buy a Honda, put in a new engine, supercharger, new tires etc just to get the same effect? I'll take the shorter route to the desire effect any day of the week.
Some people have noted that insulin spiking might lead to diabetes later on depending on your family history, but I haven't' seen any conclusive evidence of that over the long term usage of this method in bodybuilders.