Wal-Mart has threatened these sites and others like it with legal action if their ads are posted before November 19th.
Wal-Mart wants to prevent other retailers from learning of their deals early and changing their own sales to try and undercut Wal-Mart.
Come on, Wal-Mart. Are you really scared that so many people are going to not shop at your billions of locations because Best Buy has a $10 premium on you? Damn greedy fat-cats.