It's rediculous that the Chromecast counts as a device. It should be you can only cast from a registered device.
Now TV needs to sort this out. Having a device limit is bad enough (in my oppinion that and the 30 day watching history puts NowTV easily in at least 3rd place behind Netflix and Amazon), but not being able to use Chromecasts makes it worse.
I have a tablet, a phone, a living room Roku and a kitchen TV registered, but I can't then use the service from my laptop or bedroom TV. I should be able to use Chromecasts to cast from my phone (as the registered device) to any TV I choose. (Why they have a device limit anyway is a mystery when no other service has this, especially as you can't even stream on all of the registered devices at the same time).
If you agree with this, please add a "me too" post. Hopefully with enough noise about this, NowTV will change their policy.