Looks like Fake News to me, no actual Source on Image Search for the second and some 4chan threads for the first.
For once you didn't Do The Research and Lack the Memory. I remember seeing at least one of these ads in a computer mag back then, but have been unable to find a full source on that, despite over an hour of searching.
Meanwhile there is stuff like this
newspaper article that sadly lacks a proper date.
And this
Wiki article that do their bestest to confirm the story, except... they lack the evidence.
So as far as I'm concerned the ads are real - but at the same time it seems that *some people* have attempted to scrub the internet clean of these ads.