There's been talk in the past about delivering data to STBs via closed-captioning side channels [1]. I don't know if it ever was actually done, but I've got to

There's been talk in the past about delivering data to STBs via closed-captioning side channels [1]. I don't know if it ever was actually done, but I've got to imagine there's even more room in modern broadcasts for this sort of thing. 1 = https://zatznotfunny.com/2005-11/tivo-cc-tagging-patent-application/ https://zatznotfunny.com/2005-11/tivo-cc-tagging-patent-appl...