> "because it was a convenient way for their developer to include it" implies it was a deliberate choice also

I didn't word it well but that was my point. For the same reason, I wouldn't pick the "CDN" headline as it gives a possibly false narrative too.

> PLUS, "using as a CDN" is what the site was literally doing, from a functional standpoint. It was pulling that script from Internet Archive, using their upload bandwidth.

I'd be fine with "using their bandwidth". I don't see how the Internet Archive having a CDN or not is important to the story, and including this fact in the headline makes it sound important.