> Moreover, when you link to the WB machine, what do you link to? A specific archived version? Or the overview page with many different archived versions? Which

> Moreover, when you link to the WB machine, what do you link to? A specific archived version? Or the overview page with many different archived versions? Which of those versions is currently endorsed by the original publisher, and which are deprecated? How do you know this? WB also supports linking to the very latest version. If the archive is updated frequently enough I would say it is reasonable to link to that if you use WB just as a mirror. In some cases I've seen error pages being archived after the original page has been moved or removed though but that is probably just a technical issue caused by some website misconfiguration or bad error handling.