If the pdf you found is from the internet archive, it seems to be abridged, but I also don’t have an original one
Edit: it starts at page 256, while the ad is supposed to be on 92, I also guess that Amazon pdf also omits ads, so the only way to check is somewhere in a Canadian library
Stolen from the comments on ytmnd linked here, the original poster appears to be John Silveira: https://www.backwoodshome.com/the-time-travel-ad/
https://www.amazon.com/Backwoods-Home-Magazine-Sept-1997-ebook/dp/B00REOCM8I
I am tempted to buy it and see if the ads are there.
EDIT: Found the PDF, it is not the same one as referred to in the article. EDIT2: Or at least the ad is not there.
If the pdf you found is from the internet archive, it seems to be abridged, but I also don’t have an original one
Edit: it starts at page 256, while the ad is supposed to be on 92, I also guess that Amazon pdf also omits ads, so the only way to check is somewhere in a Canadian library
I thought the page 256 thing meant that it was part of something.
Any Canadians around?