In Finland they use teletext to post tweets during live events such as Eurovision Song Contest, which is like a European superbowel.
Ad for the Polish Mediatext teletext service, possibly around 2010, focusing on the erotic side of life.
Tom Moody’s proposal around 1990 for Dallas Public Access Cable. “Messages 2-6 above were translated into teletext (block capitals on blue screens) and aired individually at random times of the day”.