Dark Age of Camelot Releases Old Expansion as Patch
Popular MMOG Dark Age of Camelot has had several expansions since its launch, and recently the Shrouded Isles expansion was released to the playerbase as a patch to the game. This essentially ensures that anyone who purchases even the base game is upgraded to the better graphics engine of the Shrouded Isles expansion. The patch is downloadable from FileFront and ValueCommerce. Another notch in the trend of Massive games trying to emphasize free content additions as a selling point.
Mythic had 2 expansions "Foundations" that they released free of charge. One was an entire housing system and zones and the other was a makeover of the RvR zones and system. They have done a pretty good job with making sure that the 12 dollars a month doesn't just go to bug fixing and server costs it also pays for added content if you want to download it. On top of that they have had 2 yearly pay expansions (with the 3rd being released tomorrow Dec 7th)
I hope more companies follow Mythic's lead and make the standard monthly mmo fee actually feel like it is paying for something.