Cablevision has 99% (don't want to say 100...) coverage throughout NY (long island, at least).
Verizon, while their phone service may also cover 99%, is running a whole new infrastructure.
Boo F'n hoo. We want to provide a service, but it is unfair because someone esle is doing it cheaper?!?!
Spin it like this...
10,000 years ago, there was no Verizon or Cablevision, and there was no copper or fiber cable. Now we have all of that. So it is perfectly fair. They all started with nothing.