Doesnt seem legit. Unless it's doing the wish thing. Selling it as something else and you using it for something else.
I would gladly pay extra to have them all ran through the Silencer Shop kiosk. Heck, I bought my last two cans through my local FFL without even leaving my desk.
I can't remember, once you're printed at the kiosk and take your photo do you need to do it all again when you buy another can? From your post, it sounds like you don't.