edit: Arguable. I assume your referring to:

Please submit the original source. If a post reports on something found on another site, submit the latter.

...and I might argue that an archive of the original is just as good, judging by the verbiage referring to "If a post reports on...". Archive links don't change, remove, or add any context, they just make it accessible.

I suppose if we wanted to know this in specifics, it'd be a question for dang.