It is generally closed to the public but it's not designed for immediate generation of income to the vendor. It is for marketing new products to the press, showing new (and existing) products to buyers/business owners/store owners etc. There is some amount of selling of smaller items there (me having been twice) but this isn't widespread.
I would say that the system "works" though...SHOT is one of the biggest conventions in the country so as far as bringing revenue to the local economy it does. In fact, a few years back they tried to alternate which city it was held in and I was told there was only about 5 cities in the US that had big enough convention centers to even host this.
Also the industry seems to revolve around January and "SHOT".
There is an allowance for members of law enforcement to get in, but they are looking for large orders from departments (i.e... 100 guns...not that one officer that walks up and declares "I need me a good off duty gun..." and then needs an hour of attention and is likely to post on 3 forums about his "sorry" customer service if he don't get it...) or a store owner that will will buy 150 pair of eye pro every year from them, as opposed to that one guy that says "I need me a good pair of shootin' glasses!"
The idea I guess being that they ARE making MONEY by getting their product out farther and wider by huge orders that selling one or two pieces.
I think it's well thought out and don't see it changing. I know it looks as if all they were after was money immediately they COULD open it to the public but that has been brought up and rejected many times. Other conventions (NRA, et al) ARE for the end user/buyer.
It IS a "Shwag Fest" though... I carry a BACKPACK when I go...

