People forget that a lot of the information pre-web was somewhat pricey, and especially anything routed through a telco. The web drove prices to zero, which has had some bad effects and many very good ones.
It listed like 2 dozen spam control schemes that had been proposed that failed, mostly for social reasons.
If I had the link, I would have simply posted it as the reply.
<https://craphound.com/spamsolutions.txt>
Your post advocates a ( ) technical ( ) legislative ( ) market-based ( ) vigilante approach to fighting spam...
I spent such a long time searching for it, including using LLMs. And yet you were able to take my misleading clues and find it.
Hadn't twigged that Cory seems to be a principle source/reference these days. I think I first saw this on Slashdot back in the day.