From what they have said it's really no different than other games that sell outfits and other customization items. I do acknowledge there is a slippery slope Bungie could go down with this by making it so exotics can be bought with a few dollars, but hopefully it doesn't end up that way. On the brightest side of this, we all get free silver AND if no one utilizes the feature (or few do) it probably won't be around for long.