I know right, Knights of the Nine, Point Lookout, Broken Steel, The Pitt, the New Vegas DLCs - all nickle and diming us!

Yep. all at what was it? 20 a clip when released?
See what you people don't know is, the "DLC" (these days) is made right along side of the actual game, it is just with-held from the game. (you will not be told this OFC).
/edit
Meaning, it isn't developed AFTER but DURING the process. It is just WITH-HELD, for the purpose to bilk you. They aren't doing you any favors, other than charging you twice, for what you already paid them to develop.