I know. So why is Comcast obligated to connect to discount ISPs like Cogent? Just because Netflix decided to buy connectivity from them? What's stopping Netflix from buying connectivity from MyISP (who only has a single FastE connection to L3), then demanding Comcast peer or pay with me? What's so special about Cogent, or HE?
I don't think Comcast should be obligated to connect to any particular ISP. But every ISP along the chain needs to provision enough capacity that there isn't congestion.