Networks more control over Apps than On Demand
But I can do that with DirecTV's HBO On Demand channel.
It seems like Networks have more control over their Apps than OnDemand. I find OnDemand pretty wretched as it almost never have full seasons of shows and programs, that alone past seasons. And it's fairly random what they do have. Sometimes a network like HBO or Showtime will randomly throw up a full season of say S1 of Boardwalk empire, but then have maybe eps 4 and 7 of S2, and the last ep of the current season.
And it's all timed, I remember the first time I watched Game of Thrones was on HBO OnDemand, I was watching S1 and really getting into it, by the time I got to Episode 7 they pulled the damn season off for almost a year. So I was left hanging and lost interest in the show. I don't even bother with OnDemand anymore because it is so frustrating.
With HBO Go you get practically EVERYTHING that HBO has ever produced, plus all their movies and it doesn't seem like any of the shows are timed. So that means all seasons of GOT, Wire, Sopranos, Entourage, etc. None of which are available on their OnDemand Channels.