I don't think it has anything to do with the resources of Zenimax that they release so much DLC.
Bethesda are just awesome in every way. Todd Howard is the best game developer in history.
They make so much content, spoiling their fans. Oblivion was already the largest game in history, and still they made so much DLC and a full expansion. And now Fallout 3.
I'm so excited that Bethesda are expanding (that is thanks to big Zenimax investments though), that they bought Splash Damage and id. Such concentration of talented people it's crazy. This collaboration will spit out AAA games.
Fallout 3 DLC
Elder Scrolls 5
Brink
Rage
Elder Scrolls Online
Doom 4
Fallout 4







