The thing is that from what i know and seen, there are so many different badges so to speak and the place can only hold so much traffic that is why they have any possible offsite promotions. i kinda use metaphor and see badge sales like fishing, u toss ur line in water and wait for fish or a badge and if u get a pulled in to buy then u have a chance to catch so many at one time if others dont take any or all of them before u do. so u either catch a badge or just go home empty but know u can always enjoy any swag and events around the con.