I don't think that either is benefitting at the expense of the other. Netflix pays for huge amounts of bandwidth to all the residential ISPs where their customers are located. Verizon customers pay for huge amounts of aggregate bandwidth to Netflix and everywhere else on the internet. If there is more download traffic on Verizon's network than there is upload traffic it's only because that's all Verizon allows their customers to do. Contractually. They sell asymmetric plans. The results are not surprising.