There's also the fact that Comcast isn't a tier 1 ISP. The only netflix traffic going across their network is traffic specifically requested by Comcast custome

There's also the fact that Comcast isn't a tier 1 ISP. The only netflix traffic going across their network is traffic specifically requested by Comcast customers. It's not like Netflix (even indirectly through their ISP) is somehow using Comcast's network for non Comcast uses. Most of the peering talk was leaving that part out, trying to pretend that Netflix was using Comcast's network to reach third parties like is the model being addressed by peering agreements between tier 1 ISPs.