I've never heard that
I also havent ever heard of Live In Dallas videos being signed for promotion but someone Ebay is saying that
The only signed for promotion item I can say is 100 percent real is this
The Have-A-Go Merchant promo cds signed in green crayon given away by Sire/Reprise and KROQ. He signed about 50 for giveaways on the air. Some were held back and sent to "deserving" people. That was the term I heard.
Mine was a Christmas gift. I've only seen one on ebay and that was years ago. The one sold was won from KROQ.