nikot

the game ends when at least one caravan in each column is sold, who ever has the more sold hands wins

http://fallout.wikia.com/wiki/Caravan_(game)#Rules

imagine it like blackjack, but with three hands, and instead of the dealer drawing the cards you have a hand.

It could just be that you can trade iphone winnings for promotion codes that gice you accces to DLCs, like the Caravan Pack or some other item pack.

Has Obsidian ever considered developing a small iphone app based on their Fallout New Vagas in-game game Caravan? I know its a pretty simple game but I find my self playing it every chance I find someone in the Mojave that will play.