So - I think people are ignoring the obvious. I think they want to be able to roll out new content every week. Unlike Netflix that takes things down, I think D+ is going to leave it's content up. So rather than splat all its content at the same instance - they want to be able to say "and next week you get this, and then this". If they put everything on there at once, then everyone would be complaining "oh, it was great at first, but they never have new content." As some pointed out, it's not like you can watch the 1000 hours of shows/movies the first week. This way they keep making new additions. Seems so obvious to me.