Yeh, that’s pretty much aligns with what I remember.

But I don’t get it then - why would they broadcast software for devices no one had?

Could it be that the handful of people with computer access were well connected & well regarded, & the people running the radio broadcasts wanted to cater to them especially? I'd imagine there could be some sense of personal & national pride & prestige around supporting these emerging technologies & promoting them to the public. (I'm just guessing though - I wasn't there & haven't studied the topic in depth.)