My comment is snarky, but it doesn't criticize a weaker interpretation of what they said, it points out a problem with the phrasing. The "I'm being silly" is an acknowledgement that the snark isn't really addressing the substance, the strongest plausible interpretation of "I'm being silly" is that I understood their meaning well enough.

Fair enough on the "I'm being silly"—that does take the edge out of the comment and that's good. But I'm not sure it gets rid of it.

Pointing out "problems with the phrasing" doesn't make for very substantive discussions. Also, snark is deprecated here. Please see https://news.ycombinator.com/newsguidelines.html.

I disagree with you on the phrasing aspect for this specific case. When discussing an advertising message the phrasing is extremely important.

Albeit the thread didn't invite substantive discussion on it because of the snark.