this will blow up in their face and they will end up ditching it for something else. Managing what your home network is will be problematic because of people often changing ISPs. What about summer homes? What about those that use VPNs all the time? What about desktops in places not on the home network? What about those that use hotspots entirely?
They should just do a limit on concurrent streams like Youtube TV. Do like 3, and you can pay for more. They are making it way too complicated. Feel bad for those engineers having to try to make this work. But maybe they will end up implementing it way simpler than the legal verbiage states.