Indeed. They would send postcards to all their customers saying "Comcast has said they will cut off your access to Netflix on April 1, Call their president's office at 1-800-xxx-xxxx and tell them what you think."
Nope… Netflix is fully available on IPv6 and actually looks forward to ISPs doing this.
OK, then Disney+ or Hulu or whoever. Peering wars never end well. Don't even need postcards, just stick the flyer in with the bill.
Now Amazon might send post cards saying “Comcast has said that they will cut off your access to our store…”, but I suspect that the cost of such a campaign and the collateral damage would be well in excess of the cost of just adding IPv6 to their service.
AWS has perfectly good support for IPv6 so they must have business reasons to stick with v4. But I expect the cost of putting up banners on the homepage saying to call your ISP, for people coming through the relevant ISP, would be pretty cheap, and Amazon's customers appear to like their accounts and their Prime quite a lot. Again, peering wars never end well. This ignores the question of what the advantage to the ISP would be other than bloody-mindedness. The world is not going to abandon IPv4 any time soon and the last time I looked, the cost of routing packets is the same regardless of which header they have. Regards, John Levine, johnl@taugh.com, Primary Perpetrator of "The Internet for Dummies", Please consider the environment before reading this e-mail. https://jl.ly