If you are keeping up with the news you will see that Amazon is already cutting back on it’s original films and series.
I don't know that Amazon really had that much success with their original series to begin with. I have Amazon Prime and it's not often I watch anything they offer. I mostly use it just for the free shipping. Netflix, on the other hand, has a lot of quality programming. Hulu and Starz are making inroads as well, and then there's the titan of all of them, HBO, which boasts some of the best series of all time.
Are they all throttling back or just Amazon? I don't think people are cutting back on visual entertainment as much as they're just not going to the movies anymore.