I agree there are big differences between these ISPs and Amazon. I was just making the point that Amazon's lack of a profit wouldn't exempt it from these regulations either. Profit is as much a bookkeeping/tax/business policy as it is an actual market signal.
You can only fake it to a certain extent since you report cash flow. Even for cash flow from operating activities Google (35%), Apple (30%), and Facebook (52%!) outshone Comcast (25%).