Back in the beginning of time, I used to serve up wonderful targetted text-only Google ads.  Then... something else happened.  Eventually I gave up on ever monetizing my sites, stuck deny / in robots for all engines, and maintain a fairly large bot reject list.  For those familiar, include "mozlila" w/ the misspelling (idiotic script copy/paste).  I'm tossing out the baby with the bathwater, perhaps, but the wayback machine can still crawl my stuff. Exactly this article.
https://adactio.com/journal/20315