The way to make money in TV is twofold:
Get a popular program, so that you can sell re-runs. Stations are still paying for episodes of 'The Munsters" and "I Dream of Genie" fifty years later.
Get a program you can sell to other markets. Some rather benign shows like "Degrassi High" are sold in like 120 markets and two dozen dubbed languages. When I turn on my UK TV subscription I see "Dr Quinn Medicine Woman" on British stations. It's a rather ordinary show, but it's making money, trust me.
"Baywatch" is another example, it's in a hundred markets in syndication, making cash every day.
Netflix doesn't necessarily need to do those things, exactly, but it can leverage that strategy to get Netflix subscribers in the 100+ markets that they could be in. Netflix doesn't have to have "nothing but hits" ... people will still pay for TV when they've watched all the blockbusters and still want "something" to watch.
Maybe that's a little hard to see from America, where Netflix still is seen partly as a DVD subscription service. In the countries where it's doing well broadcasting on a subscription basis, they never did the "mail DVD" thing, and they are doing well in those markets. Better, actually, than they ever did renting movies.
Netflix is disruptive technology. The proof is how many players are trying to get into the subscription model. You need a base of subscribers, and Netflix has that. Some players have already failed, not getting the subscriber base needed to reap profits. If there was no money in it, nobody would be doing it besides Netflix, and that't not the case.
Rights to programming are National; you can't show a program just because you have the US rights outside the US. Getting those rights signed is key, and Netflix is way ahead of the game internationally. Even Amazon has little inertia there; they don't have nearly as many Amazon Prime members outside the US as they need to knock Netflix off their lead.
In the US, it's a dogfight. Outside the US, Netflix is way ahead of the game. That's TV 2.0, basically.
I'm not saying they have it made, the last words haven't been written yet, but they have a huge lead in most markets versus the competition. They've just committed to produce a half Billion $ worth of original programming in Canada over the next five years. Just an example of where they are at. So, it's their game to lose.