I think I disagree with this. There's a cost to keeping the lights on and that's part of the subscription. If you don't use any electricity, your provider still bills you for the $30 to maintain the power grid.
But you have the option to use it by maintaining the subscription. It had to be available any moment during the month you could choose to login and watch something. Someone had to keep the servers on, the content network, the authentication service when you logged in, etc.
That's fair, you paid for the ability to watch Netflix any time during the month, and whether or not you actually do, the ability to do so was was given.