Well, that's the way it is going. Netflix and Hulu carrying other people's content made sense when streaming services were new, and the content creators didn't want to be in the business of streaming. But, the technology matured, and now standing up a streaming service is not a matter of developing new technology, but of implementing known solutions. So, the content creators will pull their stuff back behind their own paywalls. Disney is certainly pulling all their stuff off Netflix. CBS will pull all their stuff off other platforms to be on CBS All Access, and so on.
So, Netflix and Hulu won't have that much content from other parties. They saw the writing on the wall, and became content creators themselves. Soon, we get to every channel being a pay channel, which looks great for the producers, but is kind of crappy to manage for consumers. Then, you get the meta-paywall, to manage it for you...
Lather, rinse, repeat.