ISP's should be classified as nothing more than common carriers, just like the phone system. Imagine your local phone company throttling your voice communications to some company because they wanted to blackmail that company into paying more to connect.
I pay for a certain bandwidth. Netflex also pays for a certain bandwidth. Verizon may have a legitimate claim that they are carrying more bandwidth than they are delivering to AWS. The conflict is between AWS and Verizon since Netflex is already paying AWS for bandwidth.