Sure you did. And the link at the top of the page was just a coincidental "banner ad" that you had nothing to do with. If you simply wanted to share that content without the link, it's just plain HTML. Trivial to do.
It's not ethical for you to be doing this kind of submarine advertising on HN without disclosure. Please just admit what you're doing rather than pretending.
Are you doing some kind of bit here? It's easier to share HTML than... a link?
If this is supposed to be an analogy to how people will argue over what's an ad so a rule is infeasible, it's a bad analogy. If it's literal then you're not making sense.
It's not ethical for you to be doing this kind of submarine advertising on HN without disclosure. Please just admit what you're doing rather than pretending.