Money is looking desperately for something to invest in and the problem of Hollywood and cable companies was that they made too much money. Netflix was a distributor who figured that out and was creating a low subscription model for content.
When the content producers realised this Netflix was exposed, they knew they would not renew their contracts and as a defensive measure just started producing content like mad. They had all this leverage because the market is flooded with money and they have a pretty stable revenue stream.
Netflix is what Napster was for music, because movies were always too big to pirate it took a little longer. Now it's too late, people don't buy a CD with one song for $12 dollars and they won't pay $100 for a cable subscription any longer.