Rather than buy bandwidth from Cogent, Netflix is now buying it directly from Comcast. It's cheaper for Netflix, it makes Comcast more money, and it gives better service to Netflix's customers. Everybody wins, except Cogent.
People forget that when all of the Netflix congestion was happening, customers watching via Apple TV didn't experience any of the drop outs or pauses. That's because for some reason, Netflix streams to Apple TV via Level 3, not Cogent. Other companies that bought transit from Cogent had the same problem with the congested interconnect. If Comcast was targeting Netflix, the Apple TV customers would have experienced the same problem. In reality the problem was a between Cogent and Comcast.