Comment by rkagerer

It's an "I wrote a letter" blog post - which I suppose may be novel for some in today's audience.

TLDR: To save space, some old GPLv2 software didn't include the full license text, instead just a short notice with an address you can contact to obtain it. Blogger did so (glad the address still worked after 30+ years), included return postage (some nifty US stamps bought off eBay), but the reply received was version 3 instead. So they did so again, and received the correct version.