[WrtCdEvrydy]

Roku does it now... you have to register the 'Roku TV' before using it (even if it's not network connected). TV generates a code, punch it into their network, get counter code.

I can totally see a month to month plan for getting a TV (the 50" is $260, so you could do a $20/month and come out ahead after the first year).

[unwiredben]

No, when setting up the TV, if you choose not to have a network connection, there is no need to link. There wouldn't be a way to link, as the TV can't reach the Roku servers.