throbb:
The Black Friday special was probably setup to differentiate the 100 that could sell at $130 ONLINE ONLY , from the normal stock they had in the chain. Chances are LG help fund the special agreed to give rebates on 100 units only.
I'd say you were right, LG does have a track record of similar promos. And given the recent announcement of the Urbane model, a stock-dump promo would fit nicely.