Most Red Dead Redemption DLC Currently Free on Xbox One

After making the much-requested game backwards compatible today, Rockstar has discounted most of Red Dead Redemption's DLC to free on Xbox One.
The Legends and Killers, Liars and Cheats and Outlaws to the End DLC packs come at no cost, as do the Myths and Mavericks and Hunting and Trading expansions.
Not included is the more sizable Undead Nightmare DLC, nor are the smaller cosmetic downloads; War Horse, Golden Guns and Deadly Assassin will all set you back a dollar.
The main game is curren