My guess is that this is a (bad) decision on the part of the corporate types ("suits") to not provide downloadable content. Silly, really, when you can download any piece of crap off of network TV - from their own sites no less - or from iTunes.
OC needs to move into the 21st Century and wake up!
On the other hand, it could be due to other reasons as well, but only a few people know the real reason.
As a side note, I've been waiting for downloadable videos from DRTV since its inception. Still waiting . . . .