I was just talking about this the other day, though the context was a little different: I was M&G'ing that some networks have a rolling window of episodes for the current season, so like 6-8 at a time, and as new episodes are released the trailing EPs get removed. My contention was: there are two types of viewers, those who want everything at once, so limited streaming doesn't appeal (i.e., they'll just wait or buy), and the watch-as-it's-aired folks, who probably don't really need streaming, but that's _probably_ the target for "limited season" streaming, folks who keep up week-to-week, but might miss an EP (and don't have a DVR).
It's that first group I think companies like Netflix are targeting. People who put value on watching it now, and that makes them seek out and subscribe to services who offer it that way - and like you addressed, there's not really an advertising model wrapped into the show, so if you watch it in a week or stretch it out to 3 months, it doesn't matter. Only _if_ there are people who hop in and out of their monthly subscription based on the availability of shows - so visitation rates don't apply, it's about monthly fees and long term retention, and they must think that offering it this way creates better consumer appeal.
Good topic.