I happened to fall under all of these conditions, having a business account and being a recent upgrader to the Note 3, so I decided to give it a shot.
Using the instructions provided by those here who've had success, I got a sales rep on the phone. I politely conveyed to her the situation regarding the particular promotion offered by the Grapevine location and how some "associates" (I didn't want to lie!) of mine had been able to have it honored on their accounts through customer service.
She didn't ever react with skepticism, but was curious to find and validate any information about a free Galaxy Gear watch offering. She Googled and asked around to no avail. I offered up the contact information given in post #17 to the grapevine location and was then put on hold. Apparently she was told by a representative there that their Galaxy Gear promo has already ended and was never for free anyway. I asked for more specifics, but that was all they discussed.
Perhaps I just happened to get the wrong person from Grapevine on the phone, but I also know I wouldn't be the first here. Has anyone spoken to someone there and confirmed this promotion? I got the strong sense that they would've gladly put one in the mail for me in the event that the promotion could be substantiated.