Original article author here: Yes, key pages were multiple times over teletext. It's a bit of a grey area for amateur radio regs, so I didn't mention it in the article, but you could use the software with say, an license-free part 15 short wave FM transmitter, to send an entire carousel of many pages. As such the code does have an option to flag ket pages and specify how many times they should be repeated over a carousel's broadcast.